3131020011105 has 128 divisors (see below), whose sum is σ = 6470111232000. Its totient is φ = 1407074913792.

The previous prime is 3131020011103. The next prime is 3131020011127. The reversal of 3131020011105 is 5011100201313.

It is not a de Polignac number, because 3131020011105 - 2¹ = 3131020011103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131020011103) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13217496 + ... + 13452294.

It is an arithmetic number, because the mean of its divisors is an integer number (50547744000).

Almost surely, 2^{3131020011105} is an apocalyptic number.

3131020011105 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3131020011105 is an abundant number, since it is smaller than the sum of its proper divisors (3339091220895).

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

3131020011105 is a wasteful number, since it uses less digits than its factorization.

3131020011105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235060 (or 235054 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 3131020011105 its reverse (5011100201313), we get a palindrome (8142120212418).

The spelling of 3131020011105 in words is "three trillion, one hundred thirty-one billion, twenty million, eleven thousand, one hundred five".