220121221110 has 32 divisors (see below), whose sum is σ = 603761064192. Its totient is φ = 50313421920.

The previous prime is 220121221039. The next prime is 220121221121. The reversal of 220121221110 is 11122121022.

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 220121221110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524097936 + ... + 524098355.

It is an arithmetic number, because the mean of its divisors is an integer number (18867533256).

Almost surely, 2^220121221110 is an apocalyptic number.

220121221110 is an abundant number, since it is smaller than the sum of its proper divisors (383639843082).

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

220121221110 is a wasteful number, since it uses less digits than its factorization.

220121221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048196308.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220121221110 its reverse (11122121022), we get a palindrome (231243342132).

The spelling of 220121221110 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".