31121412113 has 6 divisors (see below), whose sum is σ = 34207833282. Its totient is φ = 28292192720.

The previous prime is 31121412109. The next prime is 31121412143.

31121412113 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 31119429649 + 1982464 = 176407^2 + 1408^2 .

It is not a de Polignac number, because 31121412113 - 2² = 31121412109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31121412143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128600756 + ... + 128600997.

It is an arithmetic number, because the mean of its divisors is an integer number (5701305547).

Almost surely, 2^31121412113 is an apocalyptic number.

It is an amenable number.

31121412113 is a deficient number, since it is larger than the sum of its proper divisors (3086421169).

31121412113 is a wasteful number, since it uses less digits than its factorization.

31121412113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257201775 (or 257201764 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The spelling of 31121412113 in words is "thirty-one billion, one hundred twenty-one million, four hundred twelve thousand, one hundred thirteen".