102331230021 has 24 divisors (see below), whose sum is σ = 151483400640. Its totient is φ = 66531136896.

The previous prime is 102331230017. The next prime is 102331230061. The reversal of 102331230021 is 120032133201.

102331230021 is a `hidden beast` number, since 10 + 2 + 331 + 2 + 300 + 21 = 666.

It is not a de Polignac number, because 102331230021 - 2² = 102331230017 is a prime.

It is a super-2 number, since 2×102331230021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102331229976 and 102331230003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102331230061) 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, 46045 + ... + 454733.

It is an arithmetic number, because the mean of its divisors is an integer number (6311808360).

Almost surely, 2^102331230021 is an apocalyptic number.

It is an amenable number.

102331230021 is a deficient number, since it is larger than the sum of its proper divisors (49152170619).

102331230021 is a wasteful number, since it uses less digits than its factorization.

102331230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409385 (or 409382 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 102331230021 its reverse (120032133201), we get a palindrome (222363363222).

The spelling of 102331230021 in words is "one hundred two billion, three hundred thirty-one million, two hundred thirty thousand, twenty-one".