31012130113 has 4 divisors (see below), whose sum is σ = 32081513940. Its totient is φ = 29942746288.

The previous prime is 31012130069. The next prime is 31012130117. The reversal of 31012130113 is 31103121013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31103121013 = 10453 ⋅2975521.

It can be written as a sum of positive squares in 2 ways, for example, as 18830151729 + 12181978384 = 137223^2 + 110372^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012130113 - 2¹⁷ = 31011999041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012130117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534691870 + ... + 534691927.

It is an arithmetic number, because the mean of its divisors is an integer number (8020378485).

Almost surely, 2^31012130113 is an apocalyptic number.

It is an amenable number.

31012130113 is a deficient number, since it is larger than the sum of its proper divisors (1069383827).

31012130113 is a wasteful number, since it uses less digits than its factorization.

31012130113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069383826.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31012130113 its reverse (31103121013), we get a palindrome (62115251126).

The spelling of 31012130113 in words is "thirty-one billion, twelve million, one hundred thirty thousand, one hundred thirteen".