123201211291 has 2 divisors, whose sum is σ = 123201211292. Its totient is φ = 123201211290.

The previous prime is 123201211277. The next prime is 123201211303. The reversal of 123201211291 is 192112102321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123201211291 - 2¹⁵ = 123201178523 is a prime.

It is not a weakly prime, because it can be changed into another prime (123201211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600605645 + 61600605646.

It is an arithmetic number, because the mean of its divisors is an integer number (61600605646).

Almost surely, 2^123201211291 is an apocalyptic number.

123201211291 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201211291 is an equidigital number, since it uses as much as digits as its factorization.

123201211291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 123201211291 in words is "one hundred twenty-three billion, two hundred one million, two hundred eleven thousand, two hundred ninety-one".