12631866111 has 8 divisors (see below), whose sum is σ = 18713875760. Its totient is φ = 8421244056.

The previous prime is 12631866109. The next prime is 12631866127. The reversal of 12631866111 is 11166813621.

It is a happy number.

12631866111 is a `hidden beast` number, since 1 + 2 + 6 + 31 + 8 + 6 + 611 + 1 = 666.

It is not a de Polignac number, because 12631866111 - 2¹ = 12631866109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631866101) 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, 233923420 + ... + 233923473.

It is an arithmetic number, because the mean of its divisors is an integer number (2339234470).

Almost surely, 2^12631866111 is an apocalyptic number.

12631866111 is a deficient number, since it is larger than the sum of its proper divisors (6082009649).

12631866111 is an equidigital number, since it uses as much as digits as its factorization.

12631866111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467846902 (or 467846896 counting only the distinct ones).

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

The spelling of 12631866111 in words is "twelve billion, six hundred thirty-one million, eight hundred sixty-six thousand, one hundred eleven".