31000123010020 has 96 divisors (see below), whose sum is σ = 71086552588800. Its totient is φ = 11315817676800.

The previous prime is 31000123009957. The next prime is 31000123010047. The reversal of 31000123010020 is 2001032100013.

It is a super-2 number, since 2×31000123010020² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11362461 + ... + 13824100.

It is an arithmetic number, because the mean of its divisors is an integer number (740484922800).

Almost surely, 2^{31000123010020} is an apocalyptic number.

It is an amenable number.

31000123010020 is an abundant number, since it is smaller than the sum of its proper divisors (40086429578780).

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

31000123010020 is a wasteful number, since it uses less digits than its factorization.

31000123010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25186709 (or 25186707 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31000123010020 its reverse (2001032100013), we get a palindrome (33001155110033).

The spelling of 31000123010020 in words is "thirty-one trillion, one hundred twenty-three million, ten thousand, twenty".