12111102111 has 32 divisors (see below), whose sum is σ = 17064000000. Its totient is φ = 7625299968.

The previous prime is 12111102097. The next prime is 12111102139. The reversal of 12111102111 is 11120111121.

It is not a de Polignac number, because 12111102111 - 2²¹ = 12109004959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111102511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7669320 + ... + 7670898.

It is an arithmetic number, because the mean of its divisors is an integer number (533250000).

Almost surely, 2^12111102111 is an apocalyptic number.

12111102111 is a deficient number, since it is larger than the sum of its proper divisors (4952897889).

12111102111 is a wasteful number, since it uses less digits than its factorization.

12111102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12111102111 its reverse (11120111121), we get a palindrome (23231213232).

It can be divided in two parts, 12111 and 102111, that multiplied together give a palindrome (1236666321).

The spelling of 12111102111 in words is "twelve billion, one hundred eleven million, one hundred two thousand, one hundred eleven".