231011102989 has 2 divisors, whose sum is σ = 231011102990. Its totient is φ = 231011102988.

The previous prime is 231011102923. The next prime is 231011103013. The reversal of 231011102989 is 989201110132.

231011102989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225088569225 + 5922533764 = 474435^2 + 76958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231011102989 is a prime.

It is a super-2 number, since 2×231011102989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231011102089) 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, 115505551494 + 115505551495.

It is an arithmetic number, because the mean of its divisors is an integer number (115505551495).

Almost surely, 2^231011102989 is an apocalyptic number.

It is an amenable number.

231011102989 is a deficient number, since it is larger than the sum of its proper divisors (1).

231011102989 is an equidigital number, since it uses as much as digits as its factorization.

231011102989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 231011102989 in words is "two hundred thirty-one billion, eleven million, one hundred two thousand, nine hundred eighty-nine".