12402444231 has 24 divisors (see below), whose sum is σ = 18976070880. Its totient is φ = 7778797056.

The previous prime is 12402444227. The next prime is 12402444251. The reversal of 12402444231 is 13244420421.

It is not a de Polignac number, because 12402444231 - 2² = 12402444227 is a prime.

It is a super-2 number, since 2×12402444231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12402444195 and 12402444204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402444251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400150 + ... + 430028.

It is an arithmetic number, because the mean of its divisors is an integer number (790669620).

Almost surely, 2^12402444231 is an apocalyptic number.

12402444231 is a deficient number, since it is larger than the sum of its proper divisors (6573626649).

12402444231 is a wasteful number, since it uses less digits than its factorization.

12402444231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32615 (or 32612 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 12402444231 its reverse (13244420421), we get a palindrome (25646864652).

The spelling of 12402444231 in words is "twelve billion, four hundred two million, four hundred forty-four thousand, two hundred thirty-one".