111021221120111 has 12 divisors (see below), whose sum is σ = 115019263944000. Its totient is φ = 107157743934528.

The previous prime is 111021221120087. The next prime is 111021221120179. The reversal of 111021221120111 is 111021122120111.

It is not a de Polignac number, because 111021221120111 - 2²² = 111021216925807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111021221120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021221120611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19084031 + ... + 24212448.

It is an arithmetic number, because the mean of its divisors is an integer number (9584938662000).

Almost surely, 2^{111021221120111} is an apocalyptic number.

111021221120111 is a deficient number, since it is larger than the sum of its proper divisors (3998042823889).

111021221120111 is an equidigital number, since it uses as much as digits as its factorization.

111021221120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43299586 (or 43299557 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111021221120111 its reverse (111021122120111), we get a palindrome (222042343240222).

The spelling of 111021221120111 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred eleven".