111012200121221 has 32 divisors (see below), whose sum is σ = 129122553876480. Its totient is φ = 93467271655296.

The previous prime is 111012200121091. The next prime is 111012200121227. The reversal of 111012200121221 is 122121002210111.

It is not a de Polignac number, because 111012200121221 - 2³⁰ = 111011126379397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111012200121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012200121227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2878405280 + ... + 2878443846.

It is an arithmetic number, because the mean of its divisors is an integer number (4035079808640).

Almost surely, 2^{111012200121221} is an apocalyptic number.

It is an amenable number.

111012200121221 is a deficient number, since it is larger than the sum of its proper divisors (18110353755259).

111012200121221 is a wasteful number, since it uses less digits than its factorization.

111012200121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43913.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111012200121221 its reverse (122121002210111), we get a palindrome (233133202331332).

The spelling of 111012200121221 in words is "one hundred eleven trillion, twelve billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".