12001111311 has 12 divisors (see below), whose sum is σ = 18613968792. Its totient is φ = 6857777808.

The previous prime is 12001111307. The next prime is 12001111321. The reversal of 12001111311 is 11311110021.

It is not a de Polignac number, because 12001111311 - 2² = 12001111307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001111321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40819960 + ... + 40820253.

It is an arithmetic number, because the mean of its divisors is an integer number (1551164066).

Almost surely, 2^12001111311 is an apocalyptic number.

12001111311 is a deficient number, since it is larger than the sum of its proper divisors (6612857481).

12001111311 is an equidigital number, since it uses as much as digits as its factorization.

12001111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81640230 (or 81640223 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 12001111311 its reverse (11311110021), we get a palindrome (23312221332).

The spelling of 12001111311 in words is "twelve billion, one million, one hundred eleven thousand, three hundred eleven".