22100125121 has 2 divisors, whose sum is σ = 22100125122. Its totient is φ = 22100125120.

The previous prime is 22100125109. The next prime is 22100125127. The reversal of 22100125121 is 12152100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18185871025 + 3914254096 = 134855^2 + 62564^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100125121 - 2²² = 22095930817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22100125121.

It is not a weakly prime, because it can be changed into another prime (22100125127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050062560 + 11050062561.

It is an arithmetic number, because the mean of its divisors is an integer number (11050062561).

Almost surely, 2^22100125121 is an apocalyptic number.

It is an amenable number.

22100125121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100125121 is an equidigital number, since it uses as much as digits as its factorization.

22100125121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 22100125121 its reverse (12152100122), we get a palindrome (34252225243).

The spelling of 22100125121 in words is "twenty-two billion, one hundred million, one hundred twenty-five thousand, one hundred twenty-one".