232121681 has 12 divisors (see below), whose sum is σ = 266238336. Its totient is φ = 201842520.

The previous prime is 232121663. The next prime is 232121693. The reversal of 232121681 is 186121232.

It is not a de Polignac number, because 232121681 - 2¹⁴ = 232105297 is a prime.

It is a super-2 number, since 2×232121681² = 107760949580531522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 232121681.

It is not an unprimeable number, because it can be changed into a prime (232121641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38921 + ... + 44486.

It is an arithmetic number, because the mean of its divisors is an integer number (22186528).

Almost surely, 2^232121681 is an apocalyptic number.

It is an amenable number.

232121681 is a deficient number, since it is larger than the sum of its proper divisors (34116655).

232121681 is a wasteful number, since it uses less digits than its factorization.

232121681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83452 (or 83441 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 232121681 is about 15235.5400626299. The cubic root of 232121681 is about 614.5707723912.

The spelling of 232121681 in words is "two hundred thirty-two million, one hundred twenty-one thousand, six hundred eighty-one".