1123202231 has 4 divisors (see below), whose sum is σ = 1136734872. Its totient is φ = 1109669592.

The previous prime is 1123202221. The next prime is 1123202243. The reversal of 1123202231 is 1322023211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123202231 - 2¹⁸ = 1122940087 is a prime.

It is a super-2 number, since 2×1123202231² = 2523166503446754722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123202221) 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 3 ways as a sum of consecutive naturals, for example, 6766196 + ... + 6766361.

It is an arithmetic number, because the mean of its divisors is an integer number (284183718).

Almost surely, 2^1123202231 is an apocalyptic number.

1123202231 is a deficient number, since it is larger than the sum of its proper divisors (13532641).

1123202231 is an equidigital number, since it uses as much as digits as its factorization.

1123202231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13532640.

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

The square root of 1123202231 is about 33514.2093894515. The cubic root of 1123202231 is about 1039.4876146492.

Adding to 1123202231 its reverse (1322023211), we get a palindrome (2445225442).

The spelling of 1123202231 in words is "one billion, one hundred twenty-three million, two hundred two thousand, two hundred thirty-one".