31213021002130 has 32 divisors (see below), whose sum is σ = 63268152841728. Its totient is φ = 10984054310400.

The previous prime is 31213021002127. The next prime is 31213021002139. The reversal of 31213021002130 is 3120012031213.

It is a junction number, because it is equal to n+sod(n) for n = 31213021002098 and 31213021002107.

It is not an unprimeable number, because it can be changed into a prime (31213021002139) 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, 4576685887 + ... + 4576692706.

It is an arithmetic number, because the mean of its divisors is an integer number (1977129776304).

Almost surely, 2^{31213021002130} is an apocalyptic number.

31213021002130 is an abundant number, since it is smaller than the sum of its proper divisors (32055131839598).

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

31213021002130 is a wasteful number, since it uses less digits than its factorization.

31213021002130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9153378642.

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

Adding to 31213021002130 its reverse (3120012031213), we get a palindrome (34333033033343).

The spelling of 31213021002130 in words is "thirty-one trillion, two hundred thirteen billion, twenty-one million, two thousand, one hundred thirty".