102111239 has 2 divisors, whose sum is σ = 102111240. Its totient is φ = 102111238.

The previous prime is 102111203. The next prime is 102111259. The reversal of 102111239 is 932111201.

It is an a-pointer prime, because the next prime (102111259) can be obtained adding 102111239 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102111239 - 2¹⁶ = 102045703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102111239.

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, 51055619 + 51055620.

It is an arithmetic number, because the mean of its divisors is an integer number (51055620).

Almost surely, 2^102111239 is an apocalyptic number.

102111239 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111239 is an equidigital number, since it uses as much as digits as its factorization.

102111239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 102111239 is about 10105.0105888119. The cubic root of 102111239 is about 467.4026624920.

The spelling of 102111239 in words is "one hundred two million, one hundred eleven thousand, two hundred thirty-nine".