123012110591 has 2 divisors, whose sum is σ = 123012110592. Its totient is φ = 123012110590.

The previous prime is 123012110581. The next prime is 123012110629. The reversal of 123012110591 is 195011210321.

It is a weak prime.

It is an emirp because it is prime and its reverse (195011210321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123012110591 - 2¹⁰ = 123012109567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123012110591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012110531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506055295 + 61506055296.

It is an arithmetic number, because the mean of its divisors is an integer number (61506055296).

Almost surely, 2^123012110591 is an apocalyptic number.

123012110591 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012110591 is an equidigital number, since it uses as much as digits as its factorization.

123012110591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 123012110591 in words is "one hundred twenty-three billion, twelve million, one hundred ten thousand, five hundred ninety-one".