22121517168 has 60 divisors (see below), whose sum is σ = 63906618048. Its totient is φ = 7135971840.

The previous prime is 22121517167. The next prime is 22121517179. The reversal of 22121517168 is 86171512122.

It is a happy number.

22121517168 is a `hidden beast` number, since 2 + 2 + 121 + 517 + 16 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121517167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2473305 + ... + 2482232.

Almost surely, 2^22121517168 is an apocalyptic number.

It is an amenable number.

22121517168 is an abundant number, since it is smaller than the sum of its proper divisors (41785100880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121517168 is a wasteful number, since it uses less digits than its factorization.

22121517168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955582 (or 4955573 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The spelling of 22121517168 in words is "twenty-two billion, one hundred twenty-one million, five hundred seventeen thousand, one hundred sixty-eight".