12111111313 has 6 divisors (see below), whose sum is σ = 14088435666. Its totient is φ = 10380952512.

The previous prime is 12111111281. The next prime is 12111111323. The reversal of 12111111313 is 31311111121.

It can be written as a sum of positive squares in only one way, i.e., 7297943184 + 4813168129 = 85428^2 + 69377^2 .

It is not a de Polignac number, because 12111111313 - 2⁵ = 12111111281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111111323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123582720 + ... + 123582817.

It is an arithmetic number, because the mean of its divisors is an integer number (2348072611).

Almost surely, 2^12111111313 is an apocalyptic number.

It is an amenable number.

12111111313 is a deficient number, since it is larger than the sum of its proper divisors (1977324353).

12111111313 is an equidigital number, since it uses as much as digits as its factorization.

12111111313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247165551 (or 247165544 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

Adding to 12111111313 its reverse (31311111121), we get a palindrome (43422222434).

The spelling of 12111111313 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, three hundred thirteen".