1144213311 has 4 divisors (see below), whose sum is σ = 1525617752. Its totient is φ = 762808872.

The previous prime is 1144213309. The next prime is 1144213321. The reversal of 1144213311 is 1133124411.

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

It is not a de Polignac number, because 1144213311 - 2¹ = 1144213309 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 (1144213321) 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, 190702216 + ... + 190702221.

It is an arithmetic number, because the mean of its divisors is an integer number (381404438).

Almost surely, 2^1144213311 is an apocalyptic number.

1144213311 is a deficient number, since it is larger than the sum of its proper divisors (381404441).

1144213311 is an equidigital number, since it uses as much as digits as its factorization.

1144213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381404440.

The product of its digits is 288, while the sum is 21.

The square root of 1144213311 is about 33826.2222395585. Note that the first 4 decimals coincide. The cubic root of 1144213311 is about 1045.9293064958.

Adding to 1144213311 its reverse (1133124411), we get a palindrome (2277337722).

Subtracting from 1144213311 its reverse (1133124411), we obtain a square (11088900 = 3330²).

It can be divided in two parts, 11442 and 13311, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 1144213311 in words is "one billion, one hundred forty-four million, two hundred thirteen thousand, three hundred eleven".