22123122121 has 2 divisors, whose sum is σ = 22123122122. Its totient is φ = 22123122120.

The previous prime is 22123122101. The next prime is 22123122173. The reversal of 22123122121 is 12122132122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12580762896 + 9542359225 = 112164^2 + 97685^2 .

It is a cyclic number.

It is not a de Polignac number, because 22123122121 - 2⁹ = 22123121609 is a prime.

It is not a weakly prime, because it can be changed into another prime (22123122101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061561060 + 11061561061.

It is an arithmetic number, because the mean of its divisors is an integer number (11061561061).

Almost surely, 2^22123122121 is an apocalyptic number.

It is an amenable number.

22123122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22123122121 is an equidigital number, since it uses as much as digits as its factorization.

22123122121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22123122121 its reverse (12122132122), we get a palindrome (34245254243).

The spelling of 22123122121 in words is "twenty-two billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred twenty-one".