123421266165427 has 2 divisors, whose sum is σ = 123421266165428. Its totient is φ = 123421266165426.

The previous prime is 123421266165419. The next prime is 123421266165433. The reversal of 123421266165427 is 724561662124321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123421266165427 - 2³ = 123421266165419 is a prime.

It is not a weakly prime, because it can be changed into another prime (123421266165467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710633082713 + 61710633082714.

It is an arithmetic number, because the mean of its divisors is an integer number (61710633082714).

Almost surely, 2^{123421266165427} is an apocalyptic number.

123421266165427 is a deficient number, since it is larger than the sum of its proper divisors (1).

123421266165427 is an equidigital number, since it uses as much as digits as its factorization.

123421266165427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 52.

The spelling of 123421266165427 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, two hundred sixty-six million, one hundred sixty-five thousand, four hundred twenty-seven".