12812921249 has 8 divisors (see below), whose sum is σ = 12936090720. Its totient is φ = 12690337536.

The previous prime is 12812921239. The next prime is 12812921257. The reversal of 12812921249 is 94212921821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12812921249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12812921239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102419 + ... + 190040.

It is an arithmetic number, because the mean of its divisors is an integer number (1617011340).

Almost surely, 2^12812921249 is an apocalyptic number.

It is an amenable number.

12812921249 is a deficient number, since it is larger than the sum of its proper divisors (123169471).

12812921249 is a wasteful number, since it uses less digits than its factorization.

12812921249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292879.

The product of its digits is 41472, while the sum is 41.

The spelling of 12812921249 in words is "twelve billion, eight hundred twelve million, nine hundred twenty-one thousand, two hundred forty-nine".