31231312020100 has 72 divisors (see below), whose sum is σ = 67814902068480. Its totient is φ = 12484608958080.

The previous prime is 31231312020031. The next prime is 31231312020119. The reversal of 31231312020100 is 102021313213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2269215819 + ... + 2269229581.

It is an arithmetic number, because the mean of its divisors is an integer number (941873639840).

Almost surely, 2^{31231312020100} is an apocalyptic number.

It is an amenable number.

31231312020100 is an abundant number, since it is smaller than the sum of its proper divisors (36583590048380).

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

31231312020100 is a wasteful number, since it uses less digits than its factorization.

31231312020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26509 (or 26502 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31231312020100 its reverse (102021313213), we get a palindrome (31333333333313).

The spelling of 31231312020100 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twelve million, twenty thousand, one hundred".