22121021222120 has 32 divisors (see below), whose sum is σ = 49772895417000. Its totient is φ = 8848302236928.

The previous prime is 22121021222117. The next prime is 22121021222123. The reversal of 22121021222120 is 2122212012122.

It is an interprime number because it is at equal distance from previous prime (22121021222117) and next prime (22121021222123).

It can be written as a sum of positive squares in 4 ways, for example, as 17972393656996 + 4148627565124 = 4239386^2 + 2036818^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22121021222092 and 22121021222101.

It is not an unprimeable number, because it can be changed into a prime (22121021222123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95762 + ... + 6652158.

Almost surely, 2^{22121021222120} is an apocalyptic number.

22121021222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121021222120 is an abundant number, since it is smaller than the sum of its proper divisors (27651874194880).

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

22121021222120 is a wasteful number, since it uses less digits than its factorization.

22121021222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640757 (or 6640753 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22121021222120 its reverse (2122212012122), we get a palindrome (24243233234242).

The spelling of 22121021222120 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty".