22123023021 has 72 divisors (see below), whose sum is σ = 36694359520. Its totient is φ = 13308973920.

The previous prime is 22123023011. The next prime is 22123023023. The reversal of 22123023021 is 12032032122.

It is not a de Polignac number, because 22123023021 - 2¹⁴ = 22123006637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22123022985 and 22123023003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123023023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4084311 + ... + 4089723.

Almost surely, 2^22123023021 is an apocalyptic number.

It is an amenable number.

22123023021 is a deficient number, since it is larger than the sum of its proper divisors (14571336499).

22123023021 is a wasteful number, since it uses less digits than its factorization.

22123023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5589 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22123023021 its reverse (12032032122), we get a palindrome (34155055143).

The spelling of 22123023021 in words is "twenty-two billion, one hundred twenty-three million, twenty-three thousand, twenty-one".