220990122 has 48 divisors (see below), whose sum is σ = 493594920. Its totient is φ = 71404416.

The previous prime is 220990117. The next prime is 220990163. The reversal of 220990122 is 221099022.

It can be written as a sum of positive squares in 4 ways, for example, as 155525841 + 65464281 = 12471^2 + 8091^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258648 + ... + 259500.

Almost surely, 2^220990122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220990122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246797460).

220990122 is an abundant number, since it is smaller than the sum of its proper divisors (272604798).

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

220990122 is a wasteful number, since it uses less digits than its factorization.

220990122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 220990122 is about 14865.7365105130. The cubic root of 220990122 is about 604.5853516494.

Subtracting 220990122 from its reverse (221099022), we obtain a square (108900 = 330²).

The spelling of 220990122 in words is "two hundred twenty million, nine hundred ninety thousand, one hundred twenty-two".