31333112113 has 2 divisors, whose sum is σ = 31333112114. Its totient is φ = 31333112112.

The previous prime is 31333112053. The next prime is 31333112171. The reversal of 31333112113 is 31121133313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18248497569 + 13084614544 = 135087^2 + 114388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31333112113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31333112413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666556056 + 15666556057.

It is an arithmetic number, because the mean of its divisors is an integer number (15666556057).

Almost surely, 2^31333112113 is an apocalyptic number.

It is an amenable number.

31333112113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31333112113 is an equidigital number, since it uses as much as digits as its factorization.

31333112113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 22.

Adding to 31333112113 its reverse (31121133313), we get a palindrome (62454245426).

The spelling of 31333112113 in words is "thirty-one billion, three hundred thirty-three million, one hundred twelve thousand, one hundred thirteen".