112211221 has 4 divisors (see below), whose sum is σ = 113260032. Its totient is φ = 111162412.

The previous prime is 112211189. The next prime is 112211243. The reversal of 112211221 is 122112211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 112211221 - 2⁵ = 112211189 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 (112211251) 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, 524245 + ... + 524458.

It is an arithmetic number, because the mean of its divisors is an integer number (28315008).

Almost surely, 2^112211221 is an apocalyptic number.

It is an amenable number.

112211221 is a deficient number, since it is larger than the sum of its proper divisors (1048811).

112211221 is a wasteful number, since it uses less digits than its factorization.

112211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048810.

The product of its digits is 16, while the sum is 13.

The square root of 112211221 is about 10592.9797979605. The cubic root of 112211221 is about 482.3312819861.

Adding to 112211221 its reverse (122112211), we get a palindrome (234323432).

The spelling of 112211221 in words is "one hundred twelve million, two hundred eleven thousand, two hundred twenty-one".