1123234221 has 4 divisors (see below), whose sum is σ = 1497645632. Its totient is φ = 748822812.

The previous prime is 1123234219. The next prime is 1123234241. The reversal of 1123234221 is 1224323211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1123234221 - 2¹ = 1123234219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123234241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187205701 + ... + 187205706.

It is an arithmetic number, because the mean of its divisors is an integer number (374411408).

Almost surely, 2^1123234221 is an apocalyptic number.

It is an amenable number.

1123234221 is a deficient number, since it is larger than the sum of its proper divisors (374411411).

1123234221 is an equidigital number, since it uses as much as digits as its factorization.

1123234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374411410.

The product of its digits is 576, while the sum is 21.

The square root of 1123234221 is about 33514.6866463048. The cubic root of 1123234221 is about 1039.4974831282.

Adding to 1123234221 its reverse (1224323211), we get a palindrome (2347557432).

The spelling of 1123234221 in words is "one billion, one hundred twenty-three million, two hundred thirty-four thousand, two hundred twenty-one".