31131322201320 has 128 divisors (see below), whose sum is σ = 104253730352640. Its totient is φ = 7371475856640.

The previous prime is 31131322201313. The next prime is 31131322201339. The reversal of 31131322201320 is 2310222313113.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 274179694 + ... + 274293213.

It is an arithmetic number, because the mean of its divisors is an integer number (814482268380).

Almost surely, 2^{31131322201320} is an apocalyptic number.

31131322201320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31131322201320 is an abundant number, since it is smaller than the sum of its proper divisors (73122408151320).

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

31131322201320 is a wasteful number, since it uses less digits than its factorization.

31131322201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548472975 (or 548472971 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31131322201320 its reverse (2310222313113), we get a palindrome (33441544514433).

The spelling of 31131322201320 in words is "thirty-one trillion, one hundred thirty-one billion, three hundred twenty-two million, two hundred one thousand, three hundred twenty".