22122125256 has 128 divisors (see below), whose sum is σ = 70359552000. Its totient is φ = 5745983040.

The previous prime is 22122125237. The next prime is 22122125257. The reversal of 22122125256 is 65252122122.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22122125257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31600 + ... + 212703.

It is an arithmetic number, because the mean of its divisors is an integer number (549684000).

Almost surely, 2^22122125256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22122125256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35179776000).

22122125256 is an abundant number, since it is smaller than the sum of its proper divisors (48237426744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22122125256 is a wasteful number, since it uses less digits than its factorization.

22122125256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244344 (or 244326 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 22122125256 its reverse (65252122122), we get a palindrome (87374247378).

The spelling of 22122125256 in words is "twenty-two billion, one hundred twenty-two million, one hundred twenty-five thousand, two hundred fifty-six".