12991244211 has 20 divisors (see below), whose sum is σ = 21170917944. Its totient is φ = 7873480800.

The previous prime is 12991244209. The next prime is 12991244221. The reversal of 12991244211 is 11244219921.

12991244211 is a `hidden beast` number, since 129 + 91 + 2 + 442 + 1 + 1 = 666.

It is not a de Polignac number, because 12991244211 - 2¹ = 12991244209 is a prime.

It is a super-2 number, since 2×12991244211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12991244221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7289370 + ... + 7291151.

Almost surely, 2^12991244211 is an apocalyptic number.

12991244211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12991244211 is a deficient number, since it is larger than the sum of its proper divisors (8179673733).

12991244211 is a wasteful number, since it uses less digits than its factorization.

12991244211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14580544 (or 14580535 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The spelling of 12991244211 in words is "twelve billion, nine hundred ninety-one million, two hundred forty-four thousand, two hundred eleven".