31321031033020 has 12 divisors (see below), whose sum is σ = 65774165169384. Its totient is φ = 12528412413200.

The previous prime is 31321031032943. The next prime is 31321031033041. The reversal of 31321031033020 is 2033013012313.

It is a junction number, because it is equal to n+sod(n) for n = 31321031032982 and 31321031033000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783025775806 + ... + 783025775845.

It is an arithmetic number, because the mean of its divisors is an integer number (5481180430782).

Almost surely, 2^{31321031033020} is an apocalyptic number.

It is an amenable number.

31321031033020 is an abundant number, since it is smaller than the sum of its proper divisors (34453134136364).

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

31321031033020 is a wasteful number, since it uses less digits than its factorization.

31321031033020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566051551660 (or 1566051551658 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31321031033020 its reverse (2033013012313), we get a palindrome (33354044045333).

The spelling of 31321031033020 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-one million, thirty-three thousand, twenty".