12111571807 has 2 divisors, whose sum is σ = 12111571808. Its totient is φ = 12111571806.

The previous prime is 12111571781. The next prime is 12111571811. The reversal of 12111571807 is 70817511121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111571807 - 2¹⁵ = 12111539039 is a prime.

It is a super-2 number, since 2×12111571807² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111575807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055785903 + 6055785904.

It is an arithmetic number, because the mean of its divisors is an integer number (6055785904).

Almost surely, 2^12111571807 is an apocalyptic number.

12111571807 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111571807 is an equidigital number, since it uses as much as digits as its factorization.

12111571807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 34.

The spelling of 12111571807 in words is "twelve billion, one hundred eleven million, five hundred seventy-one thousand, eight hundred seven".