102102211988 has 18 divisors (see below), whose sum is σ = 207850931946. Its totient is φ = 43758090768.

The previous prime is 102102211979. The next prime is 102102211993. The reversal of 102102211988 is 889112201201.

It can be written as a sum of positive squares in only one way, i.e., 71069161744 + 31033050244 = 266588^2 + 176162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 260464631 + ... + 260465022.

It is an arithmetic number, because the mean of its divisors is an integer number (11547273997).

Almost surely, 2^102102211988 is an apocalyptic number.

It is an amenable number.

102102211988 is an abundant number, since it is smaller than the sum of its proper divisors (105748719958).

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

102102211988 is a wasteful number, since it uses less digits than its factorization.

102102211988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520929671 (or 520929662 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The spelling of 102102211988 in words is "one hundred two billion, one hundred two million, two hundred eleven thousand, nine hundred eighty-eight".