31101009913 has 2 divisors, whose sum is σ = 31101009914. Its totient is φ = 31101009912.

The previous prime is 31101009911. The next prime is 31101010007. The reversal of 31101009913 is 31990010113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29400932089 + 1700077824 = 171467^2 + 41232^2 .

It is a cyclic number.

It is not a de Polignac number, because 31101009913 - 2¹ = 31101009911 is a prime.

Together with 31101009911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31101009911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550504956 + 15550504957.

It is an arithmetic number, because the mean of its divisors is an integer number (15550504957).

Almost surely, 2^31101009913 is an apocalyptic number.

It is an amenable number.

31101009913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31101009913 is an equidigital number, since it uses as much as digits as its factorization.

31101009913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 28.

The spelling of 31101009913 in words is "thirty-one billion, one hundred one million, nine thousand, nine hundred thirteen".