22121210122021 has 8 divisors (see below), whose sum is σ = 23265642783744. Its totient is φ = 21003705287760.

The previous prime is 22121210122007. The next prime is 22121210122133. The reversal of 22121210122021 is 12022101212122.

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 22121210122021 - 2²¹ = 22121208024869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121210122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121210122721) 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, 6731955181 + ... + 6731958466.

It is an arithmetic number, because the mean of its divisors is an integer number (2908205347968).

Almost surely, 2^{22121210122021} is an apocalyptic number.

It is an amenable number.

22121210122021 is a deficient number, since it is larger than the sum of its proper divisors (1144432661723).

22121210122021 is a wasteful number, since it uses less digits than its factorization.

22121210122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13463913731.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22121210122021 its reverse (12022101212122), we get a palindrome (34143311334143).

The spelling of 22121210122021 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-two thousand, twenty-one".