102101239 has 2 divisors, whose sum is σ = 102101240. Its totient is φ = 102101238.

The previous prime is 102101213. The next prime is 102101243. The reversal of 102101239 is 932101201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102101239 - 2²³ = 93712631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102101639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050619 + 51050620.

It is an arithmetic number, because the mean of its divisors is an integer number (51050620).

Almost surely, 2^102101239 is an apocalyptic number.

102101239 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101239 is an equidigital number, since it uses as much as digits as its factorization.

102101239 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 19.

The square root of 102101239 is about 10104.5157726632. The cubic root of 102101239 is about 467.3874040371.

It can be divided in two parts, 10210 and 1239, that added together give a square (11449 = 107²).

The spelling of 102101239 in words is "one hundred two million, one hundred one thousand, two hundred thirty-nine".