31231323320100 has 72 divisors (see below), whose sum is σ = 90572287252608. Its totient is φ = 8309029526400.

The previous prime is 31231323320027. The next prime is 31231323320149. The reversal of 31231323320100 is 102332313213.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120641479 + ... + 120900078.

It is an arithmetic number, because the mean of its divisors is an integer number (1257948434064).

Almost surely, 2^{31231323320100} is an apocalyptic number.

31231323320100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31231323320100 is an abundant number, since it is smaller than the sum of its proper divisors (59340963932508).

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

31231323320100 is a wasteful number, since it uses less digits than its factorization.

31231323320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241542005 (or 241541998 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31231323320100 its reverse (102332313213), we get a palindrome (31333655633313).

The spelling of 31231323320100 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-three million, three hundred twenty thousand, one hundred".