31002140021142 has 32 divisors (see below), whose sum is σ = 64704495082752. Its totient is φ = 9884071622304.

The previous prime is 31002140021141. The next prime is 31002140021179. The reversal of 31002140021142 is 24112004120013.

It is a super-2 number, since 2×31002140021142² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002140021141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5549188 + ... + 9633159.

It is an arithmetic number, because the mean of its divisors is an integer number (2022015471336).

Almost surely, 2^{31002140021142} is an apocalyptic number.

31002140021142 is an abundant number, since it is smaller than the sum of its proper divisors (33702355061610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31002140021142 is a wasteful number, since it uses less digits than its factorization.

31002140021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15197172.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31002140021142 its reverse (24112004120013), we get a palindrome (55114144141155).

The spelling of 31002140021142 in words is "thirty-one trillion, two billion, one hundred forty million, twenty-one thousand, one hundred forty-two".