22101120121 has 2 divisors, whose sum is σ = 22101120122. Its totient is φ = 22101120120.

The previous prime is 22101120109. The next prime is 22101120149. The reversal of 22101120121 is 12102110122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19827737721 + 2273382400 = 140811^2 + 47680^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101120121 - 2⁷ = 22101119993 is a prime.

It is not a weakly prime, because it can be changed into another prime (22101120101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050560060 + 11050560061.

It is an arithmetic number, because the mean of its divisors is an integer number (11050560061).

Almost surely, 2^22101120121 is an apocalyptic number.

It is an amenable number.

22101120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22101120121 is an equidigital number, since it uses as much as digits as its factorization.

22101120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22101120121 its reverse (12102110122), we get a palindrome (34203230243).

Subtracting from 22101120121 its reverse (12102110122), we obtain a palindrome (9999009999).

The spelling of 22101120121 in words is "twenty-two billion, one hundred one million, one hundred twenty thousand, one hundred twenty-one".