31020102131323 has 4 divisors (see below), whose sum is σ = 31020126543360. Its totient is φ = 31020077719288.

The previous prime is 31020102131281. The next prime is 31020102131351. The reversal of 31020102131323 is 32313120102013.

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 31020102131323 - 2²¹ = 31020100034171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020102131294 and 31020102131303.

It is not an unprimeable number, because it can be changed into a prime (31020102131723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10188868 + ... + 12878401.

It is an arithmetic number, because the mean of its divisors is an integer number (7755031635840).

Almost surely, 2^{31020102131323} is an apocalyptic number.

31020102131323 is a deficient number, since it is larger than the sum of its proper divisors (24412037).

31020102131323 is a wasteful number, since it uses less digits than its factorization.

31020102131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24412036.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31020102131323 its reverse (32313120102013), we get a palindrome (63333222233336).

The spelling of 31020102131323 in words is "thirty-one trillion, twenty billion, one hundred two million, one hundred thirty-one thousand, three hundred twenty-three".