22121200120 has 16 divisors (see below), whose sum is σ = 49772700360. Its totient is φ = 8848480032.

The previous prime is 22121200117. The next prime is 22121200159. The reversal of 22121200120 is 2100212122.

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 22121200120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276514962 + ... + 276515041.

Almost surely, 2^22121200120 is an apocalyptic number.

22121200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121200120 is an abundant number, since it is smaller than the sum of its proper divisors (27651500240).

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

22121200120 is a wasteful number, since it uses less digits than its factorization.

22121200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553030014 (or 553030010 counting only the distinct ones).

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

Adding to 22121200120 its reverse (2100212122), we get a palindrome (24221412242).

The spelling of 22121200120 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred twenty".