12805564211 has 32 divisors (see below), whose sum is σ = 15207782400. Its totient is φ = 10651392000.

The previous prime is 12805564181. The next prime is 12805564241. The reversal of 12805564211 is 11246550821.

It is an interprime number because it is at equal distance from previous prime (12805564181) and next prime (12805564241).

It is a cyclic number.

It is not a de Polignac number, because 12805564211 - 2⁶ = 12805564147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12805564241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1322315 + ... + 1331963.

It is an arithmetic number, because the mean of its divisors is an integer number (475243200).

Almost surely, 2^12805564211 is an apocalyptic number.

12805564211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12805564211 is a deficient number, since it is larger than the sum of its proper divisors (2402218189).

12805564211 is a wasteful number, since it uses less digits than its factorization.

12805564211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9875.

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 12805564211 in words is "twelve billion, eight hundred five million, five hundred sixty-four thousand, two hundred eleven".