12240425021 has 16 divisors (see below), whose sum is σ = 13669833408. Its totient is φ = 10864022400.

The previous prime is 12240424997. The next prime is 12240425033. The reversal of 12240425021 is 12052404221.

It is not a de Polignac number, because 12240425021 - 2¹⁴ = 12240408637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240425621) 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, 1432241 + ... + 1440761.

It is an arithmetic number, because the mean of its divisors is an integer number (854364588).

Almost surely, 2^12240425021 is an apocalyptic number.

12240425021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12240425021 is a deficient number, since it is larger than the sum of its proper divisors (1429408387).

12240425021 is a wasteful number, since it uses less digits than its factorization.

12240425021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 12240425021 its reverse (12052404221), we get a palindrome (24292829242).

The spelling of 12240425021 in words is "twelve billion, two hundred forty million, four hundred twenty-five thousand, twenty-one".