111201221122111 has 16 divisors (see below), whose sum is σ = 114158208273408. Its totient is φ = 108277418340000.

The previous prime is 111201221122067. The next prime is 111201221122171. The reversal of 111201221122111 is 111221122102111.

It is a cyclic number.

It is not a de Polignac number, because 111201221122111 - 2²⁹ = 111200684251199 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 (111201221122171) 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, 1800810 + ... + 15021496.

It is an arithmetic number, because the mean of its divisors is an integer number (7134888017088).

Almost surely, 2^{111201221122111} is an apocalyptic number.

111201221122111 is a deficient number, since it is larger than the sum of its proper divisors (2956987151297).

111201221122111 is a wasteful number, since it uses less digits than its factorization.

111201221122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13221942.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111201221122111 its reverse (111221122102111), we get a palindrome (222422343224222).

The spelling of 111201221122111 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".