12999999999 has 8 divisors (see below), whose sum is σ = 19809523840. Its totient is φ = 7428571416.

The previous prime is 12999999959. The next prime is 13000000073. The reversal of 12999999999 is 99999999921.

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

It is not a de Polignac number, because 12999999999 - 2⁷ = 12999999871 is a prime.

It is a Duffinian number.

12999999999 is a modest number, since divided by 999999 gives 12999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12999999959) 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 7 ways as a sum of consecutive naturals, for example, 309523789 + ... + 309523830.

It is an arithmetic number, because the mean of its divisors is an integer number (2476190480).

Almost surely, 2^12999999999 is an apocalyptic number.

12999999999 is a deficient number, since it is larger than the sum of its proper divisors (6809523841).

12999999999 is an equidigital number, since it uses as much as digits as its factorization.

12999999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619047629.

The product of its digits is 774840978, while the sum is 84.

The spelling of 12999999999 in words is "twelve billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".