1143340211 has 4 divisors (see below), whose sum is σ = 1231289472. Its totient is φ = 1055390952.

The previous prime is 1143340157. The next prime is 1143340217. The reversal of 1143340211 is 1120433411.

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 1143340211 - 2¹⁰ = 1143339187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143340217) 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, 43974611 + ... + 43974636.

It is an arithmetic number, because the mean of its divisors is an integer number (307822368).

Almost surely, 2^1143340211 is an apocalyptic number.

1143340211 is a deficient number, since it is larger than the sum of its proper divisors (87949261).

1143340211 is an equidigital number, since it uses as much as digits as its factorization.

1143340211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87949260.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1143340211 is about 33813.3141084987. The cubic root of 1143340211 is about 1045.6632042338.

Adding to 1143340211 its reverse (1120433411), we get a palindrome (2263773622).

The spelling of 1143340211 in words is "one billion, one hundred forty-three million, three hundred forty thousand, two hundred eleven".