12012111100001 has 4 divisors (see below), whose sum is σ = 12012627129600. Its totient is φ = 12011595070404.

The previous prime is 12012111099983. The next prime is 12012111100103. The reversal of 12012111100001 is 10000111121021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012111100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012111100201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257979881 + ... + 258026438.

It is an arithmetic number, because the mean of its divisors is an integer number (3003156782400).

Almost surely, 2^{12012111100001} is an apocalyptic number.

It is an amenable number.

12012111100001 is a deficient number, since it is larger than the sum of its proper divisors (516029599).

12012111100001 is an equidigital number, since it uses as much as digits as its factorization.

12012111100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516029598.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12012111100001 its reverse (10000111121021), we get a palindrome (22012222221022).

The spelling of 12012111100001 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred thousand, one".