12365221374 has 80 divisors (see below), whose sum is σ = 30252942720. Its totient is φ = 3743709840.

The previous prime is 12365221369. The next prime is 12365221403. The reversal of 12365221374 is 47312256321.

12365221374 is a `hidden beast` number, since 1 + 2 + 3 + 65 + 221 + 374 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2640367 + ... + 2645045.

It is an arithmetic number, because the mean of its divisors is an integer number (378161784).

Almost surely, 2^12365221374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12365221374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15126471360).

12365221374 is an abundant number, since it is smaller than the sum of its proper divisors (17887721346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12365221374 is a wasteful number, since it uses less digits than its factorization.

12365221374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 6178 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

Adding to 12365221374 its reverse (47312256321), we get a palindrome (59677477695).

The spelling of 12365221374 in words is "twelve billion, three hundred sixty-five million, two hundred twenty-one thousand, three hundred seventy-four".