123202311121 has 2 divisors, whose sum is σ = 123202311122. Its totient is φ = 123202311120.

The previous prime is 123202311091. The next prime is 123202311137. The reversal of 123202311121 is 121113202321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77679821521 + 45522489600 = 278711^2 + 213360^2 .

It is a cyclic number.

It is not a de Polignac number, because 123202311121 - 2²³ = 123193922513 is a prime.

It is not a weakly prime, because it can be changed into another prime (123202311721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601155560 + 61601155561.

It is an arithmetic number, because the mean of its divisors is an integer number (61601155561).

Almost surely, 2^123202311121 is an apocalyptic number.

It is an amenable number.

123202311121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123202311121 is an equidigital number, since it uses as much as digits as its factorization.

123202311121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 123202311121 its reverse (121113202321), we get a palindrome (244315513442).

The spelling of 123202311121 in words is "one hundred twenty-three billion, two hundred two million, three hundred eleven thousand, one hundred twenty-one".