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212021121210 = 23518153517297
BaseRepresentation
bin1100010101110101110…
…0011001000010111010
3202021021010010220200220
43011131130121002322
511433204401334320
6241222352240510
721214036536423
oct3053534310272
9667233126626
10212021121210
1181a10439518
1235111540136
1316cbb96a552
14a39483a64a
1557ad9b7e40
hex315d7190ba

212021121210 has 64 divisors (see below), whose sum is σ = 511827773184. Its totient is φ = 56208384000.

The previous prime is 212021121199. The next prime is 212021121227. The reversal of 212021121210 is 12121120212.

212021121210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212021121210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29052282 + ... + 29059578.

It is an arithmetic number, because the mean of its divisors is an integer number (7997308956).

Almost surely, 2212021121210 is an apocalyptic number.

212021121210 is an abundant number, since it is smaller than the sum of its proper divisors (299806651974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021121210 is a wasteful number, since it uses less digits than its factorization.

212021121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12839.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212021121210 its reverse (12121120212), we get a palindrome (224142241422).

The spelling of 212021121210 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred ten".

Divisors: 1 2 3 5 6 10 15 30 181 362 543 905 1086 1810 2715 5351 5430 7297 10702 14594 16053 21891 26755 32106 36485 43782 53510 72970 80265 109455 160530 218910 968531 1320757 1937062 2641514 2905593 3962271 4842655 5811186 6603785 7924542 9685310 13207570 14527965 19811355 29055930 39046247 39622710 78092494 117138741 195231235 234277482 390462470 585693705 1171387410 7067370707 14134741414 21202112121 35336853535 42404224242 70673707070 106010560605 212021121210