31011012113 has 2 divisors, whose sum is σ = 31011012114. Its totient is φ = 31011012112.

The previous prime is 31011012029. The next prime is 31011012119. The reversal of 31011012113 is 31121011013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25393059904 + 5617952209 = 159352^2 + 74953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31011012113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31011012119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505506056 + 15505506057.

It is an arithmetic number, because the mean of its divisors is an integer number (15505506057).

Almost surely, 2^31011012113 is an apocalyptic number.

It is an amenable number.

31011012113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011012113 is an equidigital number, since it uses as much as digits as its factorization.

31011012113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31011012113 its reverse (31121011013), we get a palindrome (62132023126).

It can be divided in two parts, 310110 and 12113, that added together give a palindrome (322223).

The spelling of 31011012113 in words is "thirty-one billion, eleven million, twelve thousand, one hundred thirteen".