2111112221 has 8 divisors (see below), whose sum is σ = 2138016384. Its totient is φ = 2084243200.

The previous prime is 2111112191. The next prime is 2111112229. The reversal of 2111112221 is 1222111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111112221 - 2¹⁴ = 2111095837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111112196 and 2111112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111112229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124940 + ... + 140826.

It is an arithmetic number, because the mean of its divisors is an integer number (267252048).

Almost surely, 2^2111112221 is an apocalyptic number.

It is an amenable number.

2111112221 is a deficient number, since it is larger than the sum of its proper divisors (26904163).

2111112221 is a wasteful number, since it uses less digits than its factorization.

2111112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17571.

The product of its digits is 16, while the sum is 14.

The square root of 2111112221 is about 45946.8412516029. The cubic root of 2111112221 is about 1282.8339352365.

Adding to 2111112221 its reverse (1222111112), we get a palindrome (3333223333).

The spelling of 2111112221 in words is "two billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-one".