12175406421 has 4 divisors (see below), whose sum is σ = 16233875232. Its totient is φ = 8116937612.

The previous prime is 12175406381. The next prime is 12175406437. The reversal of 12175406421 is 12460457121.

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 a cyclic number.

It is not a de Polignac number, because 12175406421 - 2⁶ = 12175406357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12175406461) 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, 2029234401 + ... + 2029234406.

It is an arithmetic number, because the mean of its divisors is an integer number (4058468808).

Almost surely, 2^12175406421 is an apocalyptic number.

It is an amenable number.

12175406421 is a deficient number, since it is larger than the sum of its proper divisors (4058468811).

12175406421 is an equidigital number, since it uses as much as digits as its factorization.

12175406421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058468810.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 12175406421 in words is "twelve billion, one hundred seventy-five million, four hundred six thousand, four hundred twenty-one".