1112011221 has 4 divisors (see below), whose sum is σ = 1482681632. Its totient is φ = 741340812.

The previous prime is 1112011217. The next prime is 1112011223. The reversal of 1112011221 is 1221102111.

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 not a de Polignac number, because 1112011221 - 2² = 1112011217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1112011197 and 1112011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112011223) 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, 185335201 + ... + 185335206.

It is an arithmetic number, because the mean of its divisors is an integer number (370670408).

Almost surely, 2^1112011221 is an apocalyptic number.

It is an amenable number.

1112011221 is a deficient number, since it is larger than the sum of its proper divisors (370670411).

1112011221 is an equidigital number, since it uses as much as digits as its factorization.

1112011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370670410.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1112011221 is about 33346.8322483561. The cubic root of 1112011221 is about 1036.0237782316.

Adding to 1112011221 its reverse (1221102111), we get a palindrome (2333113332).

The spelling of 1112011221 in words is "one billion, one hundred twelve million, eleven thousand, two hundred twenty-one".