1220112223 has 4 divisors (see below), whose sum is σ = 1331031528. Its totient is φ = 1109192920.

The previous prime is 1220112221. The next prime is 1220112233. The reversal of 1220112223 is 3222110221.

It is a happy number.

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

It is not a de Polignac number, because 1220112223 - 2¹ = 1220112221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220112197 and 1220112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55459636 + ... + 55459657.

It is an arithmetic number, because the mean of its divisors is an integer number (332757882).

Almost surely, 2^1220112223 is an apocalyptic number.

1220112223 is a deficient number, since it is larger than the sum of its proper divisors (110919305).

1220112223 is a wasteful number, since it uses less digits than its factorization.

1220112223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110919304.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1220112223 is about 34930.1048237763. The cubic root of 1220112223 is about 1068.5624924263.

Adding to 1220112223 its reverse (3222110221), we get a palindrome (4442222444).

The spelling of 1220112223 in words is "one billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty-three".