220021120100 has 18 divisors (see below), whose sum is σ = 477445830834. Its totient is φ = 88008448000.

The previous prime is 220021120087. The next prime is 220021120139. The reversal of 220021120100 is 1021120022.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 68924101156 + 151097018944 = 262534^2 + 388712^2 .

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, 1100105501 + ... + 1100105700.

Almost surely, 2^220021120100 is an apocalyptic number.

220021120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021120100 is an abundant number, since it is smaller than the sum of its proper divisors (257424710734).

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

220021120100 is a wasteful number, since it uses less digits than its factorization.

220021120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200211215 (or 2200211208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220021120100 its reverse (1021120022), we get a palindrome (221042240122).

The spelling of 220021120100 in words is "two hundred twenty billion, twenty-one million, one hundred twenty thousand, one hundred".