12100112220111 has 32 divisors (see below), whose sum is σ = 17290589322240. Its totient is φ = 7507189476864.

The previous prime is 12100112220107. The next prime is 12100112220137. The reversal of 12100112220111 is 11102221100121.

It is a happy number.

It is not a de Polignac number, because 12100112220111 - 2² = 12100112220107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100112220011) 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, 82564846 + ... + 82711268.

It is an arithmetic number, because the mean of its divisors is an integer number (540330916320).

Almost surely, 2^{12100112220111} is an apocalyptic number.

12100112220111 is a deficient number, since it is larger than the sum of its proper divisors (5190477102129).

12100112220111 is a wasteful number, since it uses less digits than its factorization.

12100112220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178855.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12100112220111 its reverse (11102221100121), we get a palindrome (23202333320232).

It can be divided in two parts, 12100 and 112220111, that added together give a palindrome (112232211).

The spelling of 12100112220111 in words is "twelve trillion, one hundred billion, one hundred twelve million, two hundred twenty thousand, one hundred eleven".