22554312121 has 16 divisors (see below), whose sum is σ = 26156145600. Its totient is φ = 19232424000.

The previous prime is 22554312113. The next prime is 22554312133. The reversal of 22554312121 is 12121345522.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22554312121 - 2³ = 22554312113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22554312121.

It is not an unprimeable number, because it can be changed into a prime (22554312101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513126 + ... + 555343.

It is an arithmetic number, because the mean of its divisors is an integer number (1634759100).

Almost surely, 2^22554312121 is an apocalyptic number.

It is an amenable number.

22554312121 is a deficient number, since it is larger than the sum of its proper divisors (3601833479).

22554312121 is a wasteful number, since it uses less digits than its factorization.

22554312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068600.

The product of its digits is 4800, while the sum is 28.

Adding to 22554312121 its reverse (12121345522), we get a palindrome (34675657643).

The spelling of 22554312121 in words is "twenty-two billion, five hundred fifty-four million, three hundred twelve thousand, one hundred twenty-one".