12111111102 has 16 divisors (see below), whose sum is σ = 24244396560. Its totient is φ = 4033341312.

The previous prime is 12111111101. The next prime is 12111111113. The reversal of 12111111102 is 20111111121.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916827 + ... + 929942.

It is an arithmetic number, because the mean of its divisors is an integer number (1515274785).

Almost surely, 2^12111111102 is an apocalyptic number.

12111111102 is an abundant number, since it is smaller than the sum of its proper divisors (12133285458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111111102 is a wasteful number, since it uses less digits than its factorization.

12111111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847867.

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

Adding to 12111111102 its reverse (20111111121), we get a palindrome (32222222223).

The spelling of 12111111102 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, one hundred two".