12971981211 has 8 divisors (see below), whose sum is σ = 19766828544. Its totient is φ = 7412560680.

The previous prime is 12971981203. The next prime is 12971981221. The reversal of 12971981211 is 11218917921.

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

It is not a de Polignac number, because 12971981211 - 2³ = 12971981203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12971981221) 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, 308856675 + ... + 308856716.

It is an arithmetic number, because the mean of its divisors is an integer number (2470853568).

Almost surely, 2^12971981211 is an apocalyptic number.

12971981211 is a deficient number, since it is larger than the sum of its proper divisors (6794847333).

12971981211 is an equidigital number, since it uses as much as digits as its factorization.

12971981211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617713401.

The product of its digits is 18144, while the sum is 42.

The spelling of 12971981211 in words is "twelve billion, nine hundred seventy-one million, nine hundred eighty-one thousand, two hundred eleven".