31312022121320 has 128 divisors (see below), whose sum is σ = 77267760537600. Its totient is φ = 11375529580800.

The previous prime is 31312022121319. The next prime is 31312022121343. The reversal of 31312022121320 is 2312122021313.

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, 3689516 + ... + 8731355.

It is an arithmetic number, because the mean of its divisors is an integer number (603654379200).

Almost surely, 2^{31312022121320} is an apocalyptic number.

It is an amenable number.

31312022121320 is an abundant number, since it is smaller than the sum of its proper divisors (45955738416280).

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

31312022121320 is a wasteful number, since it uses less digits than its factorization.

31312022121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12421039 (or 12421035 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31312022121320 its reverse (2312122021313), we get a palindrome (33624144142633).

The spelling of 31312022121320 in words is "thirty-one trillion, three hundred twelve billion, twenty-two million, one hundred twenty-one thousand, three hundred twenty".