22121020120 has 32 divisors (see below), whose sum is σ = 50212768320. Its totient is φ = 8770101760.

The previous prime is 22121020091. The next prime is 22121020121. The reversal of 22121020120 is 2102012122.

It is a happy number.

It is a super-2 number, since 2×22121020120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22121020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121020121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442496 + ... + 2451535.

It is an arithmetic number, because the mean of its divisors is an integer number (1569149010).

Almost surely, 2^22121020120 is an apocalyptic number.

22121020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121020120 is an abundant number, since it is smaller than the sum of its proper divisors (28091748200).

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

22121020120 is a wasteful number, since it uses less digits than its factorization.

22121020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894155 (or 4894151 counting only the distinct ones).

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

Adding to 22121020120 its reverse (2102012122), we get a palindrome (24223032242).

The spelling of 22121020120 in words is "twenty-two billion, one hundred twenty-one million, twenty thousand, one hundred twenty".