1144135211 has 4 divisors (see below), whose sum is σ = 1144482024. Its totient is φ = 1143788400.

The previous prime is 1144135199. The next prime is 1144135229. The reversal of 1144135211 is 1125314411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144135211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144135261) 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, 168410 + ... + 175071.

It is an arithmetic number, because the mean of its divisors is an integer number (286120506).

Almost surely, 2^1144135211 is an apocalyptic number.

1144135211 is a deficient number, since it is larger than the sum of its proper divisors (346813).

1144135211 is an equidigital number, since it uses as much as digits as its factorization.

1144135211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346812.

The product of its digits is 480, while the sum is 23.

The square root of 1144135211 is about 33825.0677900282. The cubic root of 1144135211 is about 1045.9055087952.

Adding to 1144135211 its reverse (1125314411), we get a palindrome (2269449622).

The spelling of 1144135211 in words is "one billion, one hundred forty-four million, one hundred thirty-five thousand, two hundred eleven".