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212012200220 = 22512318611381
BaseRepresentation
bin1100010101110011101…
…0010111000100011100
3202021020111100200101212
43011130322113010130
511433200110401340
6241221433123552
721213600652622
oct3053472270434
9667214320355
10212012200220
1181a063a5aa7
123510a5595b8
1316cb9b65b62
14a393597512
1557acd04a65
hex315ce9711c

212012200220 has 24 divisors (see below), whose sum is σ = 445587350208. Its totient is φ = 84735979200.

The previous prime is 212012200189. The next prime is 212012200237. The reversal of 212012200220 is 22002210212.

Adding to 212012200220 its reverse (22002210212), we get a palindrome (234014410432).

212012200220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212012200195 and 212012200204.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4281071 + ... + 4330310.

It is an arithmetic number, because the mean of its divisors is an integer number (18566139592).

Almost surely, 2212012200220 is an apocalyptic number.

212012200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012200220 is an abundant number, since it is smaller than the sum of its proper divisors (233575149988).

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

212012200220 is a wasteful number, since it uses less digits than its factorization.

212012200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8612621 (or 8612619 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The spelling of 212012200220 in words is "two hundred twelve billion, twelve million, two hundred thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 1231 2462 4924 6155 12310 24620 8611381 17222762 34445524 43056905 86113810 172227620 10600610011 21201220022 42402440044 53003050055 106006100110 212012200220