31061156111 has 2 divisors, whose sum is σ = 31061156112. Its totient is φ = 31061156110.

The previous prime is 31061156083. The next prime is 31061156117. The reversal of 31061156111 is 11165116013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31061156111 - 2²² = 31056961807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061156117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530578055 + 15530578056.

It is an arithmetic number, because the mean of its divisors is an integer number (15530578056).

Almost surely, 2^31061156111 is an apocalyptic number.

31061156111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061156111 is an equidigital number, since it uses as much as digits as its factorization.

31061156111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 31061156111 in words is "thirty-one billion, sixty-one million, one hundred fifty-six thousand, one hundred eleven".