102111959 has 2 divisors, whose sum is σ = 102111960. Its totient is φ = 102111958.

The previous prime is 102111931. The next prime is 102112009. The reversal of 102111959 is 959111201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102111959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102111259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055979 + 51055980.

It is an arithmetic number, because the mean of its divisors is an integer number (51055980).

Almost surely, 2^102111959 is an apocalyptic number.

102111959 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111959 is an equidigital number, since it uses as much as digits as its factorization.

102111959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 29.

The square root of 102111959 is about 10105.0462146395. The cubic root of 102111959 is about 467.4037610623.

The spelling of 102111959 in words is "one hundred two million, one hundred eleven thousand, nine hundred fifty-nine".