22512204021 has 8 divisors (see below), whose sum is σ = 30020553664. Its totient is φ = 15005995200.

The previous prime is 22512204019. The next prime is 22512204041. The reversal of 22512204021 is 12040221522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22512204021 - 2¹ = 22512204019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22512204041) 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, 510505 + ... + 552846.

It is an arithmetic number, because the mean of its divisors is an integer number (3752569208).

Almost surely, 2^22512204021 is an apocalyptic number.

It is an amenable number.

22512204021 is a deficient number, since it is larger than the sum of its proper divisors (7508349643).

22512204021 is a wasteful number, since it uses less digits than its factorization.

22512204021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070411.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22512204021 its reverse (12040221522), we get a palindrome (34552425543).

The spelling of 22512204021 in words is "twenty-two billion, five hundred twelve million, two hundred four thousand, twenty-one".