1143211211 has 4 divisors (see below), whose sum is σ = 1180089024. Its totient is φ = 1106333400.

The previous prime is 1143211123. The next prime is 1143211213. The reversal of 1143211211 is 1121123411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1121123411 = 353 ⋅3175987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143211211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143211211.

It is not an unprimeable number, because it can be changed into a prime (1143211213) 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, 18438860 + ... + 18438921.

It is an arithmetic number, because the mean of its divisors is an integer number (295022256).

Almost surely, 2^1143211211 is an apocalyptic number.

1143211211 is a deficient number, since it is larger than the sum of its proper divisors (36877813).

1143211211 is an equidigital number, since it uses as much as digits as its factorization.

1143211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36877812.

The product of its digits is 48, while the sum is 17.

The square root of 1143211211 is about 33811.4065220600. The cubic root of 1143211211 is about 1045.6238762993.

Adding to 1143211211 its reverse (1121123411), we get a palindrome (2264334622).

The spelling of 1143211211 in words is "one billion, one hundred forty-three million, two hundred eleven thousand, two hundred eleven".