22121200121 has 8 divisors (see below), whose sum is σ = 22244100000. Its totient is φ = 21998471040.

The previous prime is 22121200117. The next prime is 22121200159. The reversal of 22121200121 is 12100212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22121200121 - 2² = 22121200117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121200096 and 22121200105.

It is not an unprimeable number, because it can be changed into a prime (22121200111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221570 + ... + 305508.

It is an arithmetic number, because the mean of its divisors is an integer number (2780512500).

Almost surely, 2^22121200121 is an apocalyptic number.

It is an amenable number.

22121200121 is a deficient number, since it is larger than the sum of its proper divisors (122899879).

22121200121 is a wasteful number, since it uses less digits than its factorization.

22121200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85399.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121200121 its reverse (12100212122), we get a palindrome (34221412243).

The spelling of 22121200121 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-one".