31113232119881 has 2 divisors, whose sum is σ = 31113232119882. Its totient is φ = 31113232119880.

The previous prime is 31113232119841. The next prime is 31113232120049. The reversal of 31113232119881 is 18891123231113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27262548036025 + 3850684083856 = 5221355^2 + 1962316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31113232119881 is a prime.

It is a super-2 number, since 2×31113232119881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31113232119841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556616059940 + 15556616059941.

It is an arithmetic number, because the mean of its divisors is an integer number (15556616059941).

Almost surely, 2^{31113232119881} is an apocalyptic number.

It is an amenable number.

31113232119881 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113232119881 is an equidigital number, since it uses as much as digits as its factorization.

31113232119881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 44.

The spelling of 31113232119881 in words is "thirty-one trillion, one hundred thirteen billion, two hundred thirty-two million, one hundred nineteen thousand, eight hundred eighty-one".