111221200001 has 4 divisors (see below), whose sum is σ = 111498560004. Its totient is φ = 110943840000.

The previous prime is 111221199979. The next prime is 111221200003. The reversal of 111221200001 is 100002122111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92978645776 + 18242554225 = 304924^2 + 135065^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221200001 - 2¹⁴ = 111221183617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221200003) 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 3 ways as a sum of consecutive naturals, for example, 138679400 + ... + 138680201.

It is an arithmetic number, because the mean of its divisors is an integer number (27874640001).

Almost surely, 2^111221200001 is an apocalyptic number.

It is an amenable number.

111221200001 is a deficient number, since it is larger than the sum of its proper divisors (277360003).

111221200001 is an equidigital number, since it uses as much as digits as its factorization.

111221200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277360002.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111221200001 its reverse (100002122111), we get a palindrome (211223322112).

The spelling of 111221200001 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred thousand, one".