31321231131310 has 16 divisors (see below), whose sum is σ = 56379232109952. Its totient is φ = 12528266658400.

The previous prime is 31321231131301. The next prime is 31321231131317. The reversal of 31321231131310 is 1313113212313.

It is a super-2 number, since 2×31321231131310² (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 (31321231131317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27641086 + ... + 28751905.

It is an arithmetic number, because the mean of its divisors is an integer number (3523702006872).

Almost surely, 2^{31321231131310} is an apocalyptic number.

31321231131310 is a deficient number, since it is larger than the sum of its proper divisors (25058000978642).

31321231131310 is a wasteful number, since it uses less digits than its factorization.

31321231131310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56448539.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31321231131310 its reverse (1313113212313), we get a palindrome (32634344343623).

The spelling of 31321231131310 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred ten".