1123210505 has 4 divisors (see below), whose sum is σ = 1347852612. Its totient is φ = 898568400.

The previous prime is 1123210483. The next prime is 1123210511. The reversal of 1123210505 is 5050123211.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 682672384 + 440538121 = 26128^2 + 20989^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1123210505 is a prime.

It is a super-3 number, since 3×1123210505³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112321046 + ... + 112321055.

It is an arithmetic number, because the mean of its divisors is an integer number (336963153).

Almost surely, 2^1123210505 is an apocalyptic number.

It is an amenable number.

1123210505 is a deficient number, since it is larger than the sum of its proper divisors (224642107).

1123210505 is an equidigital number, since it uses as much as digits as its factorization.

1123210505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224642106.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1123210505 is about 33514.3328294030. The cubic root of 1123210505 is about 1039.4901670834.

Adding to 1123210505 its reverse (5050123211), we get a palindrome (6173333716).

The spelling of 1123210505 in words is "one billion, one hundred twenty-three million, two hundred ten thousand, five hundred five".