12173444401 has 4 divisors (see below), whose sum is σ = 12237179904. Its totient is φ = 12109708900.

The previous prime is 12173444383. The next prime is 12173444441. The reversal of 12173444401 is 10444437121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10444437121 = 74021 ⋅141101.

It is a cyclic number.

It is not a de Polignac number, because 12173444401 - 2¹⁹ = 12172920113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12173444441) 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, 31867465 + ... + 31867846.

It is an arithmetic number, because the mean of its divisors is an integer number (3059294976).

Almost surely, 2^12173444401 is an apocalyptic number.

It is an amenable number.

12173444401 is a deficient number, since it is larger than the sum of its proper divisors (63735503).

12173444401 is an equidigital number, since it uses as much as digits as its factorization.

12173444401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63735502.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 12173444401 in words is "twelve billion, one hundred seventy-three million, four hundred forty-four thousand, four hundred one".