12321444004 has 9 divisors (see below), whose sum is σ = 21562915521. Its totient is φ = 6160611000.

The previous prime is 12321443977. The next prime is 12321444101. The reversal of 12321444004 is 40044412321.

The square root of 12321444004 is 111002.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10119957604 + 2201486400 = 100598^2 + 46920^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12321444004.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 194254 + ... + 249754.

Almost surely, 2^12321444004 is an apocalyptic number.

12321444004 is the 111002-nd square number.

It is an amenable number.

12321444004 is a deficient number, since it is larger than the sum of its proper divisors (9241471517).

12321444004 is an frugal number, since it uses more digits than its factorization.

12321444004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111006 (or 55503 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Multiplying 12321444004 by its sum of digits (25), we get a square (308036100100 = 555010²).

Adding to 12321444004 its reverse (40044412321), we get a palindrome (52365856325).

The spelling of 12321444004 in words is "twelve billion, three hundred twenty-one million, four hundred forty-four thousand, four".