31120000013020 has 96 divisors (see below), whose sum is σ = 69931944734400. Its totient is φ = 11591775596544.

The previous prime is 31120000012999. The next prime is 31120000013023. The reversal of 31120000013020 is 2031000002113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120000013023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12723486 + ... + 14970874.

It is an arithmetic number, because the mean of its divisors is an integer number (728457757650).

Almost surely, 2^{31120000013020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31120000013020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34965972367200).

31120000013020 is an abundant number, since it is smaller than the sum of its proper divisors (38811944721380).

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

31120000013020 is a wasteful number, since it uses less digits than its factorization.

31120000013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247847 (or 2247845 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31120000013020 its reverse (2031000002113), we get a palindrome (33151000015133).

The spelling of 31120000013020 in words is "thirty-one trillion, one hundred twenty billion, thirteen thousand, twenty".