123102001221187 has 2 divisors, whose sum is σ = 123102001221188. Its totient is φ = 123102001221186.

The previous prime is 123102001221151. The next prime is 123102001221247. The reversal of 123102001221187 is 781122100201321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123102001221187 - 2³⁹ = 122552245407299 is a prime.

It is a super-2 number, since 2×123102001221187² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123102001221107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551000610593 + 61551000610594.

It is an arithmetic number, because the mean of its divisors is an integer number (61551000610594).

Almost surely, 2^{123102001221187} is an apocalyptic number.

123102001221187 is a deficient number, since it is larger than the sum of its proper divisors (1).

123102001221187 is an equidigital number, since it uses as much as digits as its factorization.

123102001221187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The spelling of 123102001221187 in words is "one hundred twenty-three trillion, one hundred two billion, one million, two hundred twenty-one thousand, one hundred eighty-seven".