123196121 has 2 divisors, whose sum is σ = 123196122. Its totient is φ = 123196120.

The previous prime is 123196097. The next prime is 123196123. The reversal of 123196121 is 121691321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 3534400 = 10939^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 123196121 - 2¹⁴ = 123179737 is a prime.

It is a Sophie Germain prime.

Together with 123196123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123196123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61598060 + 61598061.

It is an arithmetic number, because the mean of its divisors is an integer number (61598061).

Almost surely, 2^123196121 is an apocalyptic number.

It is an amenable number.

123196121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123196121 is an equidigital number, since it uses as much as digits as its factorization.

123196121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 123196121 is about 11099.3748022130. The cubic root of 123196121 is about 497.5831646363.

The spelling of 123196121 in words is "one hundred twenty-three million, one hundred ninety-six thousand, one hundred twenty-one".