22221121200120 has 96 divisors (see below), whose sum is σ = 72236267298000. Its totient is φ = 5924186297856.

The previous prime is 22221121200043. The next prime is 22221121200133. The reversal of 22221121200120 is 2100212112222.

It is a happy number.

22221121200120 is a `hidden beast` number, since 2 + 2 + 221 + 121 + 200 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22221121200093 and 22221121200102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6053677 + ... + 9004956.

Almost surely, 2^{22221121200120} is an apocalyptic number.

22221121200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221121200120 is an abundant number, since it is smaller than the sum of its proper divisors (50015146097880).

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

22221121200120 is a wasteful number, since it uses less digits than its factorization.

22221121200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15062749 (or 15062742 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22221121200120 its reverse (2100212112222), we get a palindrome (24321333312342).

The spelling of 22221121200120 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred thousand, one hundred twenty".