22542211121 has 4 divisors (see below), whose sum is σ = 22545728244. Its totient is φ = 22538694000.

The previous prime is 22542211099. The next prime is 22542211163. The reversal of 22542211121 is 12111224522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7765134400 + 14777076721 = 88120^2 + 121561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22542211121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22542211421) 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, 1748930 + ... + 1761771.

It is an arithmetic number, because the mean of its divisors is an integer number (5636432061).

Almost surely, 2^22542211121 is an apocalyptic number.

It is an amenable number.

22542211121 is a deficient number, since it is larger than the sum of its proper divisors (3517123).

22542211121 is an equidigital number, since it uses as much as digits as its factorization.

22542211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517122.

The product of its digits is 640, while the sum is 23.

Adding to 22542211121 its reverse (12111224522), we get a palindrome (34653435643).

The spelling of 22542211121 in words is "twenty-two billion, five hundred forty-two million, two hundred eleven thousand, one hundred twenty-one".