221100022120 has 64 divisors (see below), whose sum is σ = 521371728000. Its totient is φ = 84225301248.

The previous prime is 221100022069. The next prime is 221100022181. The reversal of 221100022120 is 21220001122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221100022120.

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, 314050 + ... + 735409.

It is an arithmetic number, because the mean of its divisors is an integer number (8146433250).

Almost surely, 2^221100022120 is an apocalyptic number.

221100022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100022120 is an abundant number, since it is smaller than the sum of its proper divisors (300271705880).

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

221100022120 is a wasteful number, since it uses less digits than its factorization.

221100022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049722 (or 1049718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221100022120 its reverse (21220001122), we get a palindrome (242320023242).

The spelling of 221100022120 in words is "two hundred twenty-one billion, one hundred million, twenty-two thousand, one hundred twenty".