12321443552 has 36 divisors (see below), whose sum is σ = 26663586768. Its totient is φ = 5600654400.

The previous prime is 12321443509. The next prime is 12321443569. The reversal of 12321443552 is 25534412321.

It is a super-3 number, since 3×12321443552³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587224 + ... + 1594967.

It is an arithmetic number, because the mean of its divisors is an integer number (740655188).

Almost surely, 2^12321443552 is an apocalyptic number.

It is an amenable number.

12321443552 is an abundant number, since it is smaller than the sum of its proper divisors (14342143216).

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

12321443552 is a wasteful number, since it uses less digits than its factorization.

12321443552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182223 (or 3182204 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

Adding to 12321443552 its reverse (25534412321), we get a palindrome (37855855873).

The spelling of 12321443552 in words is "twelve billion, three hundred twenty-one million, four hundred forty-three thousand, five hundred fifty-two".