22121043121 has 2 divisors, whose sum is σ = 22121043122. Its totient is φ = 22121043120.

The previous prime is 22121043103. The next prime is 22121043143. The reversal of 22121043121 is 12134012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22038887025 + 82156096 = 148455^2 + 9064^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121043121 - 2⁵ = 22121043089 is a prime.

It is a super-2 number, since 2×22121043121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22121043181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060521560 + 11060521561.

It is an arithmetic number, because the mean of its divisors is an integer number (11060521561).

Almost surely, 2^22121043121 is an apocalyptic number.

It is an amenable number.

22121043121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121043121 is an equidigital number, since it uses as much as digits as its factorization.

22121043121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 22121043121 its reverse (12134012122), we get a palindrome (34255055243).

The spelling of 22121043121 in words is "twenty-two billion, one hundred twenty-one million, forty-three thousand, one hundred twenty-one".