12923896321 has 4 divisors (see below), whose sum is σ = 14770167232. Its totient is φ = 11077625412.

The previous prime is 12923896309. The next prime is 12923896357. The reversal of 12923896321 is 12369832921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12923896321 - 2¹¹ = 12923894273 is a prime.

It is a super-2 number, since 2×12923896321² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12923896361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923135445 + ... + 923135458.

It is an arithmetic number, because the mean of its divisors is an integer number (3692541808).

Almost surely, 2^12923896321 is an apocalyptic number.

It is an amenable number.

12923896321 is a deficient number, since it is larger than the sum of its proper divisors (1846270911).

12923896321 is an equidigital number, since it uses as much as digits as its factorization.

12923896321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846270910.

The product of its digits is 279936, while the sum is 46.

The spelling of 12923896321 in words is "twelve billion, nine hundred twenty-three million, eight hundred ninety-six thousand, three hundred twenty-one".