111221200120111 has 16 divisors (see below), whose sum is σ = 113889895067520. Its totient is φ = 108556265432160.

The previous prime is 111221200120067. The next prime is 111221200120123. The reversal of 111221200120111 is 111021002122111.

It is a cyclic number.

It is not a de Polignac number, because 111221200120111 - 2⁴³ = 102425107097903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221200120181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367572000 + ... + 367874458.

It is an arithmetic number, because the mean of its divisors is an integer number (7118118441720).

Almost surely, 2^{111221200120111} is an apocalyptic number.

111221200120111 is a deficient number, since it is larger than the sum of its proper divisors (2668694947409).

111221200120111 is a wasteful number, since it uses less digits than its factorization.

111221200120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308646.

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

Adding to 111221200120111 its reverse (111021002122111), we get a palindrome (222242202242222).

The spelling of 111221200120111 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred million, one hundred twenty thousand, one hundred eleven".