31201133111020 has 48 divisors (see below), whose sum is σ = 68978254716000. Its totient is φ = 11822330903040.

The previous prime is 31201133111017. The next prime is 31201133111041. The reversal of 31201133111020 is 2011133110213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777745 + ... + 7937704.

It is an arithmetic number, because the mean of its divisors is an integer number (1437046973250).

Almost surely, 2^{31201133111020} is an apocalyptic number.

It is an amenable number.

31201133111020 is an abundant number, since it is smaller than the sum of its proper divisors (37777121604980).

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

31201133111020 is a wasteful number, since it uses less digits than its factorization.

31201133111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724898 (or 8724896 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31201133111020 its reverse (2011133110213), we get a palindrome (33212266221233).

The spelling of 31201133111020 in words is "thirty-one trillion, two hundred one billion, one hundred thirty-three million, one hundred eleven thousand, twenty".