21122022303221 has 32 divisors (see below), whose sum is σ = 24712469832960. Its totient is φ = 17680597622784.

The previous prime is 21122022303199. The next prime is 21122022303229. The reversal of 21122022303221 is 12230322022112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21122022303221 - 2³⁰ = 21120948561397 is a prime.

It is a super-2 number, since 2×21122022303221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122022303229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20816741 + ... + 21807813.

It is an arithmetic number, because the mean of its divisors is an integer number (772264682280).

Almost surely, 2^{21122022303221} is an apocalyptic number.

It is an amenable number.

21122022303221 is a deficient number, since it is larger than the sum of its proper divisors (3590447529739).

21122022303221 is a wasteful number, since it uses less digits than its factorization.

21122022303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991565.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21122022303221 its reverse (12230322022112), we get a palindrome (33352344325333).

The spelling of 21122022303221 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-two million, three hundred three thousand, two hundred twenty-one".