102221021220 has 24 divisors (see below), whose sum is σ = 286218859584. Its totient is φ = 27258938976.

The previous prime is 102221021173. The next prime is 102221021239. The reversal of 102221021220 is 22120122201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102221021220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851841784 + ... + 851841903.

It is an arithmetic number, because the mean of its divisors is an integer number (11925785816).

Almost surely, 2^102221021220 is an apocalyptic number.

102221021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102221021220 is an abundant number, since it is smaller than the sum of its proper divisors (183997838364).

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

102221021220 is a wasteful number, since it uses less digits than its factorization.

102221021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703683699 (or 1703683697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102221021220 its reverse (22120122201), we get a palindrome (124341143421).

The spelling of 102221021220 in words is "one hundred two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty".