123210421039 has 4 divisors (see below), whose sum is σ = 125298733320. Its totient is φ = 121122108760.

The previous prime is 123210421027. The next prime is 123210421063. The reversal of 123210421039 is 930124012321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123210421039 - 2²³ = 123202032431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123210420998 and 123210421016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123210421099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044156052 + ... + 1044156169.

It is an arithmetic number, because the mean of its divisors is an integer number (31324683330).

Almost surely, 2^123210421039 is an apocalyptic number.

123210421039 is a deficient number, since it is larger than the sum of its proper divisors (2088312281).

123210421039 is an equidigital number, since it uses as much as digits as its factorization.

123210421039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088312280.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 123210421039 in words is "one hundred twenty-three billion, two hundred ten million, four hundred twenty-one thousand, thirty-nine".