31011353199991 has 2 divisors, whose sum is σ = 31011353199992. Its totient is φ = 31011353199990.

The previous prime is 31011353199979. The next prime is 31011353200039. The reversal of 31011353199991 is 19999135311013.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31011353199991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31011353199961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505676599995 + 15505676599996.

It is an arithmetic number, because the mean of its divisors is an integer number (15505676599996).

Almost surely, 2^{31011353199991} is an apocalyptic number.

31011353199991 is a deficient number, since it is larger than the sum of its proper divisors (1).

31011353199991 is an equidigital number, since it uses as much as digits as its factorization.

31011353199991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 885735, while the sum is 55.

The spelling of 31011353199991 in words is "thirty-one trillion, eleven billion, three hundred fifty-three million, one hundred ninety-nine thousand, nine hundred ninety-one".