111221200011111 has 4 divisors (see below), whose sum is σ = 148294933348152. Its totient is φ = 74147466674072.

The previous prime is 111221200011101. The next prime is 111221200011169. The reversal of 111221200011111 is 111110002122111.

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

It is a cyclic number.

It is not a de Polignac number, because 111221200011111 - 2⁷ = 111221200010983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221200011101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18536866668516 + ... + 18536866668521.

It is an arithmetic number, because the mean of its divisors is an integer number (37073733337038).

Almost surely, 2^{111221200011111} is an apocalyptic number.

111221200011111 is a deficient number, since it is larger than the sum of its proper divisors (37073733337041).

111221200011111 is an equidigital number, since it uses as much as digits as its factorization.

111221200011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37073733337040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111221200011111 its reverse (111110002122111), we get a palindrome (222331202133222).

The spelling of 111221200011111 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred million, eleven thousand, one hundred eleven".