31311012013210 has 24 divisors (see below), whose sum is σ = 57443278552380. Its totient is φ = 12288095269632.

The previous prime is 31311012013201. The next prime is 31311012013213. The reversal of 31311012013210 is 1231021011313.

It can be written as a sum of positive squares in 6 ways, for example, as 16874029055601 + 14436982957609 = 4107801^2 + 3799603^2 .

It is not an unprimeable number, because it can be changed into a prime (31311012013213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 557305695 + ... + 557361874.

Almost surely, 2^{31311012013210} is an apocalyptic number.

31311012013210 is a deficient number, since it is larger than the sum of its proper divisors (26132266539170).

31311012013210 is a wasteful number, since it uses less digits than its factorization.

31311012013210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114667682 (or 1114667629 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31311012013210 its reverse (1231021011313), we get a palindrome (32542033024523).

The spelling of 31311012013210 in words is "thirty-one trillion, three hundred eleven billion, twelve million, thirteen thousand, two hundred ten".