1121331223 has 4 divisors (see below), whose sum is σ = 1121398200. Its totient is φ = 1121264248.

The previous prime is 1121331221. The next prime is 1121331251. The reversal of 1121331223 is 3221331211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121331223 - 2¹ = 1121331221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121331223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121331221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16236 + ... + 50062.

It is an arithmetic number, because the mean of its divisors is an integer number (280349550).

Almost surely, 2^1121331223 is an apocalyptic number.

1121331223 is a deficient number, since it is larger than the sum of its proper divisors (66977).

1121331223 is an equidigital number, since it uses as much as digits as its factorization.

1121331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66976.

The product of its digits is 216, while the sum is 19.

The square root of 1121331223 is about 33486.2841025994. The cubic root of 1121331223 is about 1038.9101079132.

Adding to 1121331223 its reverse (3221331211), we get a palindrome (4342662434).

It can be divided in two parts, 11213 and 31223, that added together give a square (42436 = 206²).

The spelling of 1121331223 in words is "one billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-three".