221110012120 has 32 divisors (see below), whose sum is σ = 497534626800. Its totient is φ = 88437409408.

The previous prime is 221110012103. The next prime is 221110012157. The reversal of 221110012120 is 21210011122.

It is a self number, because there is not a number n which added to its sum of digits gives 221110012120.

It is a congruent number.

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, 355911 + ... + 754249.

Almost surely, 2^221110012120 is an apocalyptic number.

221110012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110012120 is an abundant number, since it is smaller than the sum of its proper divisors (276424614680).

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

221110012120 is a wasteful number, since it uses less digits than its factorization.

221110012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412227 (or 412223 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221110012120 its reverse (21210011122), we get a palindrome (242320023242).

The spelling of 221110012120 in words is "two hundred twenty-one billion, one hundred ten million, twelve thousand, one hundred twenty".