22222021121021 has 16 divisors (see below), whose sum is σ = 22922878440384. Its totient is φ = 21526524923904.

The previous prime is 22222021121011. The next prime is 22222021121029. The reversal of 22222021121021 is 12012112022222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22222021121021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22222021120984 and 22222021121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222021121029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18463166 + ... + 19629888.

It is an arithmetic number, because the mean of its divisors is an integer number (1432679902524).

Almost surely, 2^{22222021121021} is an apocalyptic number.

It is an amenable number.

22222021121021 is a deficient number, since it is larger than the sum of its proper divisors (700857319363).

22222021121021 is a wasteful number, since it uses less digits than its factorization.

22222021121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169020.

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

Adding to 22222021121021 its reverse (12012112022222), we get a palindrome (34234133143243).

The spelling of 22222021121021 in words is "twenty-two trillion, two hundred twenty-two billion, twenty-one million, one hundred twenty-one thousand, twenty-one".