111121212200001 has 16 divisors (see below), whose sum is σ = 148717970831808. Its totient is φ = 73803091032000.

The previous prime is 111121212199997. The next prime is 111121212200041. The reversal of 111121212200001 is 100002212121111.

It is a happy number.

It is not a de Polignac number, because 111121212200001 - 2² = 111121212199997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111121212200041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56556150 + ... + 58487951.

It is an arithmetic number, because the mean of its divisors is an integer number (9294873176988).

Almost surely, 2^{111121212200001} is an apocalyptic number.

It is an amenable number.

111121212200001 is a deficient number, since it is larger than the sum of its proper divisors (37596758631807).

111121212200001 is a wasteful number, since it uses less digits than its factorization.

111121212200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115045312.

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

Adding to 111121212200001 its reverse (100002212121111), we get a palindrome (211123424321112).

The spelling of 111121212200001 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred thousand, one".