123222322121 has 2 divisors, whose sum is σ = 123222322122. Its totient is φ = 123222322120.

The previous prime is 123222322117. The next prime is 123222322129. The reversal of 123222322121 is 121223222321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119069164096 + 4153158025 = 345064^2 + 64445^2 .

It is an emirp because it is prime and its reverse (121223222321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123222322121 - 2² = 123222322117 is a prime.

It is not a weakly prime, because it can be changed into another prime (123222322129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61611161060 + 61611161061.

It is an arithmetic number, because the mean of its divisors is an integer number (61611161061).

Almost surely, 2^123222322121 is an apocalyptic number.

It is an amenable number.

123222322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123222322121 is an equidigital number, since it uses as much as digits as its factorization.

123222322121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

Adding to 123222322121 its reverse (121223222321), we get a palindrome (244445544442).

The spelling of 123222322121 in words is "one hundred twenty-three billion, two hundred twenty-two million, three hundred twenty-two thousand, one hundred twenty-one".