1121223231 has 12 divisors (see below), whose sum is σ = 1704784120. Its totient is φ = 708140880.

The previous prime is 1121223227. The next prime is 1121223239. The reversal of 1121223231 is 1323221211.

It is not a de Polignac number, because 1121223231 - 2² = 1121223227 is a prime.

It is a super-2 number, since 2×1121223231² = 2514283067468158722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121223239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3278260 + ... + 3278601.

Almost surely, 2^1121223231 is an apocalyptic number.

1121223231 is a deficient number, since it is larger than the sum of its proper divisors (583560889).

1121223231 is a wasteful number, since it uses less digits than its factorization.

1121223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556886 (or 6556883 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1121223231 is about 33484.6715826809. The cubic root of 1121223231 is about 1038.8767554181.

Adding to 1121223231 its reverse (1323221211), we get a palindrome (2444444442).

It can be divided in two parts, 11212 and 23231, that added together give a palindrome (34443).

The spelling of 1121223231 in words is "one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-one".