12012100111 has 4 divisors (see below), whose sum is σ = 13104109224. Its totient is φ = 10920091000.

The previous prime is 12012100033. The next prime is 12012100117. The reversal of 12012100111 is 11100121021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12012100111 - 2¹³ = 12012091919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012100117) 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 3 ways as a sum of consecutive naturals, for example, 546004540 + ... + 546004561.

It is an arithmetic number, because the mean of its divisors is an integer number (3276027306).

Almost surely, 2^12012100111 is an apocalyptic number.

12012100111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12012100111 is a deficient number, since it is larger than the sum of its proper divisors (1092009113).

12012100111 is a wasteful number, since it uses less digits than its factorization.

12012100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092009112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12012100111 its reverse (11100121021), we get a palindrome (23112221132).

The spelling of 12012100111 in words is "twelve billion, twelve million, one hundred thousand, one hundred eleven".