31311011301320 has 32 divisors (see below), whose sum is σ = 70556679547200. Its totient is φ = 12505399343808.

The previous prime is 31311011301319. The next prime is 31311011301341. The reversal of 31311011301320 is 2310311011313.

It is a super-2 number, since 2×31311011301320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31311011301292 and 31311011301301.

It is an unprimeable number.

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, 593885084 + ... + 593937803.

It is an arithmetic number, because the mean of its divisors is an integer number (2204896235850).

Almost surely, 2^{31311011301320} is an apocalyptic number.

It is an amenable number.

31311011301320 is an abundant number, since it is smaller than the sum of its proper divisors (39245668245880).

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

31311011301320 is a wasteful number, since it uses less digits than its factorization.

31311011301320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187823557 (or 1187823553 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 31311011301320 its reverse (2310311011313), we get a palindrome (33621322312633).

The spelling of 31311011301320 in words is "thirty-one trillion, three hundred eleven billion, eleven million, three hundred one thousand, three hundred twenty".