12423233021 has 8 divisors (see below), whose sum is σ = 13250028600. Its totient is φ = 11607106048.

The previous prime is 12423232963. The next prime is 12423233027. The reversal of 12423233021 is 12033232421.

It can be written as a sum of positive squares in 4 ways, for example, as 5936702500 + 6486530521 = 77050^2 + 80539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12423233021 - 2²² = 12419038717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423233027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2664746 + ... + 2669403.

It is an arithmetic number, because the mean of its divisors is an integer number (1656253575).

Almost surely, 2^12423233021 is an apocalyptic number.

It is an amenable number.

12423233021 is a deficient number, since it is larger than the sum of its proper divisors (826795579).

12423233021 is a wasteful number, since it uses less digits than its factorization.

12423233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334303.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 12423233021 its reverse (12033232421), we get a palindrome (24456465442).

The spelling of 12423233021 in words is "twelve billion, four hundred twenty-three million, two hundred thirty-three thousand, twenty-one".