1211130223 has 4 divisors (see below), whose sum is σ = 1211450848. Its totient is φ = 1210809600.

The previous prime is 1211130209. The next prime is 1211130241. The reversal of 1211130223 is 3220311121.

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 1211130223 - 2⁵ = 1211130191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211130197 and 1211130206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211130203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154578 + ... + 162223.

It is an arithmetic number, because the mean of its divisors is an integer number (302862712).

Almost surely, 2^1211130223 is an apocalyptic number.

1211130223 is a deficient number, since it is larger than the sum of its proper divisors (320625).

1211130223 is an equidigital number, since it uses as much as digits as its factorization.

1211130223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320624.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1211130223 is about 34801.2962833283. The cubic root of 1211130223 is about 1065.9339153792.

Adding to 1211130223 its reverse (3220311121), we get a palindrome (4431441344).

The spelling of 1211130223 in words is "one billion, two hundred eleven million, one hundred thirty thousand, two hundred twenty-three".