123226121 has 2 divisors, whose sum is σ = 123226122. Its totient is φ = 123226120.

The previous prime is 123226093. The next prime is 123226123. The reversal of 123226121 is 121622321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 17547721 = 10280^2 + 4189^2 .

It is a cyclic number.

It is not a de Polignac number, because 123226121 - 2¹⁰ = 123225097 is a prime.

Together with 123226123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123226093 and 123226102.

It is not a weakly prime, because it can be changed into another prime (123226123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61613060 + 61613061.

It is an arithmetic number, because the mean of its divisors is an integer number (61613061).

Almost surely, 2^123226121 is an apocalyptic number.

It is an amenable number.

123226121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123226121 is an equidigital number, since it uses as much as digits as its factorization.

123226121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 123226121 is about 11100.7261474194. The cubic root of 123226121 is about 497.6235508738.

Adding to 123226121 its reverse (121622321), we get a palindrome (244848442).

The spelling of 123226121 in words is "one hundred twenty-three million, two hundred twenty-six thousand, one hundred twenty-one".