111112202221 has 4 divisors (see below), whose sum is σ = 114943657500. Its totient is φ = 107280746944.

The previous prime is 111112202177. The next prime is 111112202231. The reversal of 111112202221 is 122202211111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23386055625 + 87726146596 = 152925^2 + 296186^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112202221 - 2²⁹ = 110575331309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112202195 and 111112202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112202231) 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, 1915727596 + ... + 1915727653.

It is an arithmetic number, because the mean of its divisors is an integer number (28735914375).

Almost surely, 2^111112202221 is an apocalyptic number.

It is an amenable number.

111112202221 is a deficient number, since it is larger than the sum of its proper divisors (3831455279).

111112202221 is an equidigital number, since it uses as much as digits as its factorization.

111112202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831455278.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111112202221 its reverse (122202211111), we get a palindrome (233314413332).

The spelling of 111112202221 in words is "one hundred eleven billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".