22121554899 has 16 divisors (see below), whose sum is σ = 29815904160. Its totient is φ = 14587622400.

The previous prime is 22121554891. The next prime is 22121554909. The reversal of 22121554899 is 99845512122.

It is not a de Polignac number, because 22121554899 - 2³ = 22121554891 is a prime.

It is a super-2 number, since 2×22121554899² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121554891) 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, 533197 + ... + 573185.

It is an arithmetic number, because the mean of its divisors is an integer number (1863494010).

Almost surely, 2^22121554899 is an apocalyptic number.

22121554899 is a deficient number, since it is larger than the sum of its proper divisors (7694349261).

22121554899 is a wasteful number, since it uses less digits than its factorization.

22121554899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41990.

The product of its digits is 518400, while the sum is 48.

The spelling of 22121554899 in words is "twenty-two billion, one hundred twenty-one million, five hundred fifty-four thousand, eight hundred ninety-nine".