12111112101 has 16 divisors (see below), whose sum is σ = 17790585408. Its totient is φ = 7267392000.

The previous prime is 12111112087. The next prime is 12111112109. The reversal of 12111112101 is 10121111121.

It is not a de Polignac number, because 12111112101 - 2¹⁸ = 12110849957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111112109) 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, 1813516 + ... + 1820181.

It is an arithmetic number, because the mean of its divisors is an integer number (1111911588).

Almost surely, 2^12111112101 is an apocalyptic number.

12111112101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111112101 is a deficient number, since it is larger than the sum of its proper divisors (5679473307).

12111112101 is a wasteful number, since it uses less digits than its factorization.

12111112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633812.

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

Adding to 12111112101 its reverse (10121111121), we get a palindrome (22232223222).

The spelling of 12111112101 in words is "twelve billion, one hundred eleven million, one hundred twelve thousand, one hundred one".