22121133121 has 2 divisors, whose sum is σ = 22121133122. Its totient is φ = 22121133120.

The previous prime is 22121133107. The next prime is 22121133239. The reversal of 22121133121 is 12133112122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11540130625 + 10581002496 = 107425^2 + 102864^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121133121 - 2¹³ = 22121124929 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121133521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060566560 + 11060566561.

It is an arithmetic number, because the mean of its divisors is an integer number (11060566561).

Almost surely, 2^22121133121 is an apocalyptic number.

It is an amenable number.

22121133121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121133121 is an equidigital number, since it uses as much as digits as its factorization.

22121133121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 22121133121 its reverse (12133112122), we get a palindrome (34254245243).

The spelling of 22121133121 in words is "twenty-two billion, one hundred twenty-one million, one hundred thirty-three thousand, one hundred twenty-one".