123134421287 has 2 divisors, whose sum is σ = 123134421288. Its totient is φ = 123134421286.

The previous prime is 123134421271. The next prime is 123134421313. The reversal of 123134421287 is 782124431321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123134421287 - 2⁴ = 123134421271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123134421287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123134421217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61567210643 + 61567210644.

It is an arithmetic number, because the mean of its divisors is an integer number (61567210644).

Almost surely, 2^123134421287 is an apocalyptic number.

123134421287 is a deficient number, since it is larger than the sum of its proper divisors (1).

123134421287 is an equidigital number, since it uses as much as digits as its factorization.

123134421287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The spelling of 123134421287 in words is "one hundred twenty-three billion, one hundred thirty-four million, four hundred twenty-one thousand, two hundred eighty-seven".