22121554897 has 16 divisors (see below), whose sum is σ = 25082512000. Its totient is φ = 19340964864.

The previous prime is 22121554891. The next prime is 22121554909. The reversal of 22121554897 is 79845512122.

It is not a de Polignac number, because 22121554897 - 2¹⁹ = 22121030609 is a prime.

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, 1843804 + ... + 1855762.

It is an arithmetic number, because the mean of its divisors is an integer number (1567657000).

Almost surely, 2^22121554897 is an apocalyptic number.

It is an amenable number.

22121554897 is a deficient number, since it is larger than the sum of its proper divisors (2960957103).

22121554897 is a wasteful number, since it uses less digits than its factorization.

22121554897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19480.

The product of its digits is 403200, while the sum is 46.

The spelling of 22121554897 in words is "twenty-two billion, one hundred twenty-one million, five hundred fifty-four thousand, eight hundred ninety-seven".