111200111121221 has 4 divisors (see below), whose sum is σ = 112859814272352. Its totient is φ = 109540407970092.

The previous prime is 111200111121149. The next prime is 111200111121259. The reversal of 111200111121221 is 122121111002111.

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-111200111121221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111200111121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111200111129221) 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, 829851575465 + ... + 829851575598.

It is an arithmetic number, because the mean of its divisors is an integer number (28214953568088).

Almost surely, 2^{111200111121221} is an apocalyptic number.

It is an amenable number.

111200111121221 is a deficient number, since it is larger than the sum of its proper divisors (1659703151131).

111200111121221 is an equidigital number, since it uses as much as digits as its factorization.

111200111121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659703151130.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111200111121221 its reverse (122121111002111), we get a palindrome (233321222123332).

The spelling of 111200111121221 in words is "one hundred eleven trillion, two hundred billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".