22121222021021 has 16 divisors (see below), whose sum is σ = 22827524160000. Its totient is φ = 21420682227648.

The previous prime is 22121222020987. The next prime is 22121222021029. The reversal of 22121222021021 is 12012022212122.

It is not a de Polignac number, because 22121222021021 - 2²² = 22121217826717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121222020984 and 22121222021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121222021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28487135 + ... + 29253363.

It is an arithmetic number, because the mean of its divisors is an integer number (1426720260000).

Almost surely, 2^{22121222021021} is an apocalyptic number.

It is an amenable number.

22121222021021 is a deficient number, since it is larger than the sum of its proper divisors (706302138979).

22121222021021 is a wasteful number, since it uses less digits than its factorization.

22121222021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769988.

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

Adding to 22121222021021 its reverse (12012022212122), we get a palindrome (34133244233143).

The spelling of 22121222021021 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, twenty-one".