111111012100001 has 8 divisors (see below), whose sum is σ = 111227776531200. Its totient is φ = 110994268669200.

The previous prime is 111111012099953. The next prime is 111111012100013. The reversal of 111111012100001 is 100001210111111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111111012100001 - 2²² = 111111007905697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111012100031) 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, 5348495 + ... + 15837563.

It is an arithmetic number, because the mean of its divisors is an integer number (13903472066400).

Almost surely, 2^{111111012100001} is an apocalyptic number.

It is an amenable number.

111111012100001 is a deficient number, since it is larger than the sum of its proper divisors (116764431199).

111111012100001 is a wasteful number, since it uses less digits than its factorization.

111111012100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500199.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111111012100001 its reverse (100001210111111), we get a palindrome (211112222211112).

The spelling of 111111012100001 in words is "one hundred eleven trillion, one hundred eleven billion, twelve million, one hundred thousand, one".