22145654121 has 16 divisors (see below), whose sum is σ = 30939216000. Its totient is φ = 14063258880.

The previous prime is 22145654093. The next prime is 22145654123. The reversal of 22145654121 is 12145654122.

It is a happy number.

It is not a de Polignac number, because 22145654121 - 2¹⁴ = 22145637737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22145654123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649246 + ... + 682503.

It is an arithmetic number, because the mean of its divisors is an integer number (1933701000).

Almost surely, 2^22145654121 is an apocalyptic number.

It is an amenable number.

22145654121 is a deficient number, since it is larger than the sum of its proper divisors (8793561879).

22145654121 is a wasteful number, since it uses less digits than its factorization.

22145654121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332016.

The product of its digits is 19200, while the sum is 33.

Subtracting from 22145654121 its reverse (12145654122), we obtain a palindrome (9999999999).

The spelling of 22145654121 in words is "twenty-two billion, one hundred forty-five million, six hundred fifty-four thousand, one hundred twenty-one".