102011239988 has 24 divisors (see below), whose sum is σ = 206896040064. Its totient is φ = 43103340000.

The previous prime is 102011239987. The next prime is 102011240011. The reversal of 102011239988 is 889932110201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011239987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25654763 + ... + 25658738.

It is an arithmetic number, because the mean of its divisors is an integer number (8620668336).

Almost surely, 2^102011239988 is an apocalyptic number.

It is an amenable number.

102011239988 is an abundant number, since it is smaller than the sum of its proper divisors (104884800076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102011239988 is a wasteful number, since it uses less digits than its factorization.

102011239988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51313583 (or 51313581 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 102011239988 in words is "one hundred two billion, eleven million, two hundred thirty-nine thousand, nine hundred eighty-eight".