102031220109989 has 2 divisors, whose sum is σ = 102031220109990. Its totient is φ = 102031220109988.

The previous prime is 102031220109943. The next prime is 102031220110007. The reversal of 102031220109989 is 989901022130201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90705471219364 + 11325748890625 = 9523942^2 + 3365375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102031220109989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102031220109919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51015610054994 + 51015610054995.

It is an arithmetic number, because the mean of its divisors is an integer number (51015610054995).

Almost surely, 2^{102031220109989} is an apocalyptic number.

It is an amenable number.

102031220109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102031220109989 is an equidigital number, since it uses as much as digits as its factorization.

102031220109989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 102031220109989 in words is "one hundred two trillion, thirty-one billion, two hundred twenty million, one hundred nine thousand, nine hundred eighty-nine".