22121510055 has 16 divisors (see below), whose sum is σ = 36933304320. Its totient is φ = 11285175968.

The previous prime is 22121510051. The next prime is 22121510071. The reversal of 22121510055 is 55001512122.

It is a cyclic number.

It is not a de Polignac number, because 22121510055 - 2² = 22121510051 is a prime.

It is a super-2 number, since 2×22121510055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121510051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32059815 + ... + 32060504.

It is an arithmetic number, because the mean of its divisors is an integer number (2308331520).

Almost surely, 2^22121510055 is an apocalyptic number.

22121510055 is a deficient number, since it is larger than the sum of its proper divisors (14811794265).

22121510055 is a wasteful number, since it uses less digits than its factorization.

22121510055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64120350.

The product of its (nonzero) digits is 1000, while the sum is 24.

The spelling of 22121510055 in words is "twenty-two billion, one hundred twenty-one million, five hundred ten thousand, fifty-five".