31023212102131 has 4 divisors (see below), whose sum is σ = 31023321561064. Its totient is φ = 31023102643200.

The previous prime is 31023212102123. The next prime is 31023212102293. The reversal of 31023212102131 is 13120121232013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31023212102131 - 2³ = 31023212102123 is a prime.

It is a super-2 number, since 2×31023212102131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023212112131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54303225 + ... + 54871546.

It is an arithmetic number, because the mean of its divisors is an integer number (7755830390266).

Almost surely, 2^{31023212102131} is an apocalyptic number.

31023212102131 is a deficient number, since it is larger than the sum of its proper divisors (109458933).

31023212102131 is a wasteful number, since it uses less digits than its factorization.

31023212102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109458932.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31023212102131 its reverse (13120121232013), we get a palindrome (44143333334144).

The spelling of 31023212102131 in words is "thirty-one trillion, twenty-three billion, two hundred twelve million, one hundred two thousand, one hundred thirty-one".