221022112120 has 128 divisors (see below), whose sum is σ = 505569600000. Its totient is φ = 86955517440.

The previous prime is 221022112109. The next prime is 221022112139. The reversal of 221022112120 is 21211220122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221022112094 and 221022112103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392578959 + ... + 392579521.

It is an arithmetic number, because the mean of its divisors is an integer number (3949762500).

Almost surely, 2^221022112120 is an apocalyptic number.

221022112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022112120 is an abundant number, since it is smaller than the sum of its proper divisors (284547487880).

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

221022112120 is a wasteful number, since it uses less digits than its factorization.

221022112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221022112120 its reverse (21211220122), we get a palindrome (242233332242).

The spelling of 221022112120 in words is "two hundred twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred twenty".