22511165121 has 24 divisors (see below), whose sum is σ = 32776436160. Its totient is φ = 14887706400.

The previous prime is 22511165057. The next prime is 22511165129. The reversal of 22511165121 is 12156111522.

It is a happy number.

22511165121 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 1 + 1 + 651 + 2 + 1 = 666.

It is not a de Polignac number, because 22511165121 - 2⁶ = 22511165057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22511165129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661636 + ... + 694826.

It is an arithmetic number, because the mean of its divisors is an integer number (1365684840).

Almost surely, 2^22511165121 is an apocalyptic number.

It is an amenable number.

22511165121 is a deficient number, since it is larger than the sum of its proper divisors (10265271039).

22511165121 is a wasteful number, since it uses less digits than its factorization.

22511165121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33797 (or 33794 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

Adding to 22511165121 its reverse (12156111522), we get a palindrome (34667276643).

The spelling of 22511165121 in words is "twenty-two billion, five hundred eleven million, one hundred sixty-five thousand, one hundred twenty-one".