1123220231 has 16 divisors (see below), whose sum is σ = 1293159168. Its totient is φ = 955680000.

The previous prime is 1123220221. The next prime is 1123220239. The reversal of 1123220231 is 1320223211.

It is a cyclic number.

It is not a de Polignac number, because 1123220231 - 2¹⁴ = 1123203847 is a prime.

It is a super-2 number, since 2×1123220231² = 2523247374655386722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123220239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619316 + ... + 621126.

It is an arithmetic number, because the mean of its divisors is an integer number (80822448).

Almost surely, 2^1123220231 is an apocalyptic number.

1123220231 is a deficient number, since it is larger than the sum of its proper divisors (169938937).

1123220231 is a wasteful number, since it uses less digits than its factorization.

1123220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1123220231 is about 33514.4779311867. The cubic root of 1123220231 is about 1039.4931674269.

Adding to 1123220231 its reverse (1320223211), we get a palindrome (2443443442).

The spelling of 1123220231 in words is "one billion, one hundred twenty-three million, two hundred twenty thousand, two hundred thirty-one".