102221992 has 16 divisors (see below), whose sum is σ = 195744960. Its totient is φ = 50023344.

The previous prime is 102221989. The next prime is 102222023. The reversal of 102221992 is 299122201.

It is a self number, because there is not a number n which added to its sum of digits gives 102221992.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135558 + ... + 136309.

It is an arithmetic number, because the mean of its divisors is an integer number (12234060).

Almost surely, 2^102221992 is an apocalyptic number.

It is an amenable number.

102221992 is a deficient number, since it is larger than the sum of its proper divisors (93522968).

102221992 is a wasteful number, since it uses less digits than its factorization.

102221992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271920 (or 271916 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 102221992 is about 10110.4892067595. The cubic root of 102221992 is about 467.5715878819.

It can be divided in two parts, 10222199 and 2, that added together give a palindrome (10222201).

The spelling of 102221992 in words is "one hundred two million, two hundred twenty-one thousand, nine hundred ninety-two".