111112210121111 has 4 divisors (see below), whose sum is σ = 111153809603424. Its totient is φ = 111070610638800.

The previous prime is 111112210121089. The next prime is 111112210121131. The reversal of 111112210121111 is 111121012211111.

It is a happy number.

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 111112210121111 - 2⁴² = 106714163610007 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 111112210121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112210121131) 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, 20799737150 + ... + 20799742491.

It is an arithmetic number, because the mean of its divisors is an integer number (27788452400856).

Almost surely, 2^{111112210121111} is an apocalyptic number.

111112210121111 is a deficient number, since it is larger than the sum of its proper divisors (41599482313).

111112210121111 is an equidigital number, since it uses as much as digits as its factorization.

111112210121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41599482312.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111112210121111 its reverse (111121012211111), we get a palindrome (222233222332222).

The spelling of 111112210121111 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".