12111111103 has 16 divisors (see below), whose sum is σ = 14983237696. Its totient is φ = 9532753920.

The previous prime is 12111111101. The next prime is 12111111113. The reversal of 12111111103 is 30111111121.

It is a cyclic number.

It is not a de Polignac number, because 12111111103 - 2¹ = 12111111101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111111101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327228 + ... + 362353.

It is an arithmetic number, because the mean of its divisors is an integer number (936452356).

Almost surely, 2^12111111103 is an apocalyptic number.

12111111103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12111111103 is a deficient number, since it is larger than the sum of its proper divisors (2872126593).

12111111103 is a wasteful number, since it uses less digits than its factorization.

12111111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689794.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 12111111103 its reverse (30111111121), we get a palindrome (42222222224).

The spelling of 12111111103 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, one hundred three".