123000331021 has 4 divisors (see below), whose sum is σ = 123468013152. Its totient is φ = 122532648892.

The previous prime is 123000330997. The next prime is 123000331033. The reversal of 123000331021 is 120133000321.

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 123000331021 - 2²⁹ = 122463460109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123000330986 and 123000331004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123000331061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233840671 + ... + 233841196.

It is an arithmetic number, because the mean of its divisors is an integer number (30867003288).

Almost surely, 2^123000331021 is an apocalyptic number.

It is an amenable number.

123000331021 is a deficient number, since it is larger than the sum of its proper divisors (467682131).

123000331021 is an equidigital number, since it uses as much as digits as its factorization.

123000331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467682130.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 123000331021 its reverse (120133000321), we get a palindrome (243133331342).

The spelling of 123000331021 in words is "one hundred twenty-three billion, three hundred thirty-one thousand, twenty-one".