31012001113 has 4 divisors (see below), whose sum is σ = 31065748660. Its totient is φ = 30958253568.

The previous prime is 31012001101. The next prime is 31012001129. The reversal of 31012001113 is 31110021013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30316729689 + 695271424 = 174117^2 + 26368^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012001113 - 2⁵ = 31012001081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31012001093 and 31012001102.

It is not an unprimeable number, because it can be changed into a prime (31012001143) 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, 26872908 + ... + 26874061.

It is an arithmetic number, because the mean of its divisors is an integer number (7766437165).

Almost surely, 2^31012001113 is an apocalyptic number.

It is an amenable number.

31012001113 is a deficient number, since it is larger than the sum of its proper divisors (53747547).

31012001113 is an equidigital number, since it uses as much as digits as its factorization.

31012001113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53747546.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31012001113 its reverse (31110021013), we get a palindrome (62122022126).

The spelling of 31012001113 in words is "thirty-one billion, twelve million, one thousand, one hundred thirteen".