12173353421 has 8 divisors (see below), whose sum is σ = 12916350720. Its totient is φ = 11433347008.

The previous prime is 12173353417. The next prime is 12173353427. The reversal of 12173353421 is 12435337121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12173353421 - 2² = 12173353417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12173353427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739331 + ... + 755616.

It is an arithmetic number, because the mean of its divisors is an integer number (1614543840).

Almost surely, 2^12173353421 is an apocalyptic number.

It is an amenable number.

12173353421 is a deficient number, since it is larger than the sum of its proper divisors (742997299).

12173353421 is a wasteful number, since it uses less digits than its factorization.

12173353421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495443.

The product of its digits is 15120, while the sum is 32.

The spelling of 12173353421 in words is "twelve billion, one hundred seventy-three million, three hundred fifty-three thousand, four hundred twenty-one".