12981538411 has 4 divisors (see below), whose sum is σ = 13226473152. Its totient is φ = 12736603672.

The previous prime is 12981538379. The next prime is 12981538417. The reversal of 12981538411 is 11483518921.

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 12981538411 - 2⁵ = 12981538379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12981538417) 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, 122467291 + ... + 122467396.

It is an arithmetic number, because the mean of its divisors is an integer number (3306618288).

Almost surely, 2^12981538411 is an apocalyptic number.

12981538411 is a deficient number, since it is larger than the sum of its proper divisors (244934741).

12981538411 is an equidigital number, since it uses as much as digits as its factorization.

12981538411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244934740.

The product of its digits is 69120, while the sum is 43.

The spelling of 12981538411 in words is "twelve billion, nine hundred eighty-one million, five hundred thirty-eight thousand, four hundred eleven".