12172299511 has 4 divisors (see below), whose sum is σ = 12175057224. Its totient is φ = 12169541800.

The previous prime is 12172299487. The next prime is 12172299533. The reversal of 12172299511 is 11599227121.

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

It is a cyclic number.

It is not a de Polignac number, because 12172299511 - 2¹³ = 12172291319 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172299611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372225 + ... + 1381066.

It is an arithmetic number, because the mean of its divisors is an integer number (3043764306).

Almost surely, 2^12172299511 is an apocalyptic number.

12172299511 is a deficient number, since it is larger than the sum of its proper divisors (2757713).

12172299511 is an equidigital number, since it uses as much as digits as its factorization.

12172299511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757712.

The product of its digits is 22680, while the sum is 40.

The spelling of 12172299511 in words is "twelve billion, one hundred seventy-two million, two hundred ninety-nine thousand, five hundred eleven".