31311130001020 has 24 divisors (see below), whose sum is σ = 69214076845200. Its totient is φ = 11865270316032.

The previous prime is 31311130001017. The next prime is 31311130001033. The reversal of 31311130001020 is 2010003111313.

It is a junction number, because it is equal to n+sod(n) for n = 31311130000985 and 31311130001003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41198854885 + ... + 41198855644.

It is an arithmetic number, because the mean of its divisors is an integer number (2883919868550).

Almost surely, 2^{31311130001020} is an apocalyptic number.

It is an amenable number.

31311130001020 is an abundant number, since it is smaller than the sum of its proper divisors (37902946844180).

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

31311130001020 is a wasteful number, since it uses less digits than its factorization.

31311130001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82397710557 (or 82397710555 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31311130001020 its reverse (2010003111313), we get a palindrome (33321133112333).

The spelling of 31311130001020 in words is "thirty-one trillion, three hundred eleven billion, one hundred thirty million, one thousand, twenty".