3131112111115 has 4 divisors (see below), whose sum is σ = 3757334533344. Its totient is φ = 2504889688888.

The previous prime is 3131112111047. The next prime is 3131112111119. The reversal of 3131112111115 is 5111112111313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3131112111115 - 2²¹ = 3131110013963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131112111119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 313111211107 + ... + 313111211116.

It is an arithmetic number, because the mean of its divisors is an integer number (939333633336).

Almost surely, 2^{3131112111115} is an apocalyptic number.

3131112111115 is a deficient number, since it is larger than the sum of its proper divisors (626222422229).

3131112111115 is an equidigital number, since it uses as much as digits as its factorization.

3131112111115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626222422228.

The product of its digits is 90, while the sum is 22.

Adding to 3131112111115 its reverse (5111112111313), we get a palindrome (8242224222428).

The spelling of 3131112111115 in words is "three trillion, one hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, one hundred fifteen".