12169999999 has 4 divisors (see below), whose sum is σ = 12170261664. Its totient is φ = 12169738336.

The previous prime is 12169999969. The next prime is 12170000009. The reversal of 12169999999 is 99999996121.

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 12169999999 - 2¹¹ = 12169997951 is a prime.

It is a Duffinian number.

12169999999 is a modest number, since divided by 999999 gives 12169 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12169999969) 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, 40087 + ... + 161080.

It is an arithmetic number, because the mean of its divisors is an integer number (3042565416).

Almost surely, 2^12169999999 is an apocalyptic number.

12169999999 is a deficient number, since it is larger than the sum of its proper divisors (261665).

12169999999 is an equidigital number, since it uses as much as digits as its factorization.

12169999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261664.

The product of its digits is 57395628, while the sum is 73.

The spelling of 12169999999 in words is "twelve billion, one hundred sixty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".