11872568321 has 6 divisors (see below), whose sum is σ = 11889283266. Its totient is φ = 11855861600.

The previous prime is 11872568311. The next prime is 11872568377. The reversal of 11872568321 is 12386527811.

It can be written as a sum of positive squares in only one way, i.e., 8422650625 + 3449917696 = 91775^2 + 58736^2 .

It is not a de Polignac number, because 11872568321 - 2¹⁸ = 11872306177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11872568311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3232316 + ... + 3235986.

It is an arithmetic number, because the mean of its divisors is an integer number (1981547211).

Almost surely, 2^11872568321 is an apocalyptic number.

It is an amenable number.

11872568321 is a deficient number, since it is larger than the sum of its proper divisors (16714945).

11872568321 is an frugal number, since it uses more digits than its factorization.

11872568321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223 (or 4552 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The spelling of 11872568321 in words is "eleven billion, eight hundred seventy-two million, five hundred sixty-eight thousand, three hundred twenty-one".