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212021121231 = 3227199187719
BaseRepresentation
bin1100010101110101110…
…0011001000011001111
3202021021010010220201200
43011131130121003033
511433204401334411
6241222352240543
721214036536453
oct3053534310317
9667233126650
10212021121231
1181a10439537
1235111540153
1316cbb96a56a
14a39483a663
1557ad9b7e56
hex315d7190cf

212021121231 has 24 divisors (see below), whose sum is σ = 307696496640. Its totient is φ = 140682128400.

The previous prime is 212021121227. The next prime is 212021121269. The reversal of 212021121231 is 132121120212.

212021121231 is a `hidden beast` number, since 212 + 0 + 211 + 212 + 31 = 666.

It is not a de Polignac number, because 212021121231 - 22 = 212021121227 is a prime.

It is a super-2 number, since 2×2120211212312 (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2373190 + ... + 2460908.

It is an arithmetic number, because the mean of its divisors is an integer number (12820687360).

Almost surely, 2212021121231 is an apocalyptic number.

212021121231 is a deficient number, since it is larger than the sum of its proper divisors (95675375409).

212021121231 is a wasteful number, since it uses less digits than its factorization.

212021121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88987 (or 88984 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212021121231 its reverse (132121120212), we get a palindrome (344142241443).

The spelling of 212021121231 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred thirty-one".

Divisors: 1 3 9 271 813 991 2439 2973 8919 87719 263157 268561 789471 805683 2417049 23771849 71315547 86929529 213946641 260788587 782365761 23557902359 70673707077 212021121231