123243542114191 has 2 divisors, whose sum is σ = 123243542114192. Its totient is φ = 123243542114190.

The previous prime is 123243542114141. The next prime is 123243542114257. The reversal of 123243542114191 is 191411245342321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123243542114191 - 2³⁹ = 122693786300303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243542114101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621771057095 + 61621771057096.

It is an arithmetic number, because the mean of its divisors is an integer number (61621771057096).

Almost surely, 2^{123243542114191} is an apocalyptic number.

123243542114191 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243542114191 is an equidigital number, since it uses as much as digits as its factorization.

123243542114191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The spelling of 123243542114191 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred forty-two million, one hundred fourteen thousand, one hundred ninety-one".