102110111989 has 2 divisors, whose sum is σ = 102110111990. Its totient is φ = 102110111988.

The previous prime is 102110111969. The next prime is 102110112007. The reversal of 102110111989 is 989111011201.

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., 65835862225 + 36274249764 = 256585^2 + 190458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102110111989 is a prime.

It is a super-2 number, since 2×102110111989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102110111969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055055994 + 51055055995.

It is an arithmetic number, because the mean of its divisors is an integer number (51055055995).

Almost surely, 2^102110111989 is an apocalyptic number.

It is an amenable number.

102110111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102110111989 is an equidigital number, since it uses as much as digits as its factorization.

102110111989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 102110111989 in words is "one hundred two billion, one hundred ten million, one hundred eleven thousand, nine hundred eighty-nine".