12023240421 has 16 divisors (see below), whose sum is σ = 16216001280. Its totient is φ = 7923041280.

The previous prime is 12023240419. The next prime is 12023240491. The reversal of 12023240421 is 12404232021.

It is not a de Polignac number, because 12023240421 - 2¹ = 12023240419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023240491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1529461 + ... + 1537301.

It is an arithmetic number, because the mean of its divisors is an integer number (1013500080).

Almost surely, 2^12023240421 is an apocalyptic number.

It is an amenable number.

12023240421 is a deficient number, since it is larger than the sum of its proper divisors (4192760859).

12023240421 is an equidigital number, since it uses as much as digits as its factorization.

12023240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13676.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12023240421 its reverse (12404232021), we get a palindrome (24427472442).

The spelling of 12023240421 in words is "twelve billion, twenty-three million, two hundred forty thousand, four hundred twenty-one".