22521111021 has 16 divisors (see below), whose sum is σ = 33766595520. Its totient is φ = 14833180080.

The previous prime is 22521110977. The next prime is 22521111023. The reversal of 22521111021 is 12011112522.

It is not a de Polignac number, because 22521111021 - 2¹⁴ = 22521094637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22521110985 and 22521111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521111023) 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, 5022550 + ... + 5027031.

It is an arithmetic number, because the mean of its divisors is an integer number (2110412220).

Almost surely, 2^22521111021 is an apocalyptic number.

It is an amenable number.

22521111021 is a deficient number, since it is larger than the sum of its proper divisors (11245484499).

22521111021 is a wasteful number, since it uses less digits than its factorization.

22521111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10049673 (or 10049667 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 22521111021 its reverse (12011112522), we get a palindrome (34532223543).

The spelling of 22521111021 in words is "twenty-two billion, five hundred twenty-one million, one hundred eleven thousand, twenty-one".