12293604721 has 4 divisors (see below), whose sum is σ = 12420343012. Its totient is φ = 12166866432.

The previous prime is 12293604709. The next prime is 12293604731. The reversal of 12293604721 is 12740639221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2306400625 + 9987204096 = 48025^2 + 99936^2 .

It is a cyclic number.

It is not a de Polignac number, because 12293604721 - 2²⁵ = 12260050289 is a prime.

It is a super-2 number, since 2×12293604721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12293604731) 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, 63369000 + ... + 63369193.

It is an arithmetic number, because the mean of its divisors is an integer number (3105085753).

Almost surely, 2^12293604721 is an apocalyptic number.

It is an amenable number.

12293604721 is a deficient number, since it is larger than the sum of its proper divisors (126738291).

12293604721 is an equidigital number, since it uses as much as digits as its factorization.

12293604721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126738290.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 12293604721 in words is "twelve billion, two hundred ninety-three million, six hundred four thousand, seven hundred twenty-one".