22521264121 has 4 divisors (see below), whose sum is σ = 23247756544. Its totient is φ = 21794771700.

The previous prime is 22521264071. The next prime is 22521264127. The reversal of 22521264121 is 12146212522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22521264121 - 2¹¹ = 22521262073 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 22521264121.

It is not an unprimeable number, because it can be changed into a prime (22521264127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363246165 + ... + 363246226.

It is an arithmetic number, because the mean of its divisors is an integer number (5811939136).

Almost surely, 2^22521264121 is an apocalyptic number.

It is an amenable number.

22521264121 is a deficient number, since it is larger than the sum of its proper divisors (726492423).

22521264121 is an equidigital number, since it uses as much as digits as its factorization.

22521264121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726492422.

The product of its digits is 3840, while the sum is 28.

Adding to 22521264121 its reverse (12146212522), we get a palindrome (34667476643).

The spelling of 22521264121 in words is "twenty-two billion, five hundred twenty-one million, two hundred sixty-four thousand, one hundred twenty-one".