12330491721 has 32 divisors (see below), whose sum is σ = 17051430528. Its totient is φ = 7919608320.

The previous prime is 12330491717. The next prime is 12330491729. The reversal of 12330491721 is 12719403321.

It is not a de Polignac number, because 12330491721 - 2² = 12330491717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12330491729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11239645 + ... + 11240741.

It is an arithmetic number, because the mean of its divisors is an integer number (532857204).

Almost surely, 2^12330491721 is an apocalyptic number.

It is an amenable number.

12330491721 is a deficient number, since it is larger than the sum of its proper divisors (4720938807).

12330491721 is a wasteful number, since it uses less digits than its factorization.

12330491721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 12330491721 in words is "twelve billion, three hundred thirty million, four hundred ninety-one thousand, seven hundred twenty-one".