31002113203021 has 8 divisors (see below), whose sum is σ = 31865298121440. Its totient is φ = 30140259335568.

The previous prime is 31002113203007. The next prime is 31002113203051. The reversal of 31002113203021 is 12030231120013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31002113203021 - 2²³ = 31002104814413 is a prime.

It is a super-2 number, since 2×31002113203021² (a number of 28 digits) 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 31002113203021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002113203051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332715511 + ... + 332808676.

It is an arithmetic number, because the mean of its divisors is an integer number (3983162265180).

Almost surely, 2^{31002113203021} is an apocalyptic number.

It is an amenable number.

31002113203021 is a deficient number, since it is larger than the sum of its proper divisors (863184918419).

31002113203021 is a wasteful number, since it uses less digits than its factorization.

31002113203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665525483.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31002113203021 its reverse (12030231120013), we get a palindrome (43032344323034).

The spelling of 31002113203021 in words is "thirty-one trillion, two billion, one hundred thirteen million, two hundred three thousand, twenty-one".