123230002021 has 4 divisors (see below), whose sum is σ = 140834288032. Its totient is φ = 105625716012.

The previous prime is 123230001991. The next prime is 123230002031. The reversal of 123230002021 is 120200032321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123230002021 - 2⁵ = 123230001989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123230001986 and 123230002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123230002031) 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, 8802142995 + ... + 8802143008.

It is an arithmetic number, because the mean of its divisors is an integer number (35208572008).

Almost surely, 2^123230002021 is an apocalyptic number.

It is an amenable number.

123230002021 is a deficient number, since it is larger than the sum of its proper divisors (17604286011).

123230002021 is an equidigital number, since it uses as much as digits as its factorization.

123230002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17604286010.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 123230002021 its reverse (120200032321), we get a palindrome (243430034342).

The spelling of 123230002021 in words is "one hundred twenty-three billion, two hundred thirty million, two thousand, twenty-one".