1143221211 has 24 divisors (see below), whose sum is σ = 1806597936. Its totient is φ = 690877440.

The previous prime is 1143221173. The next prime is 1143221213. The reversal of 1143221211 is 1121223411.

1143221211 is a `hidden beast` number, since 1 + 1 + 432 + 21 + 211 = 666.

It is not a de Polignac number, because 1143221211 - 2⁹ = 1143220699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143221213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18591 + ... + 51303.

It is an arithmetic number, because the mean of its divisors is an integer number (75274914).

Almost surely, 2^1143221211 is an apocalyptic number.

1143221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1143221211 is a deficient number, since it is larger than the sum of its proper divisors (663376725).

1143221211 is a wasteful number, since it uses less digits than its factorization.

1143221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33083 (or 33080 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1143221211 is about 33811.5544008258. The cubic root of 1143221211 is about 1045.6269250822.

Adding to 1143221211 its reverse (1121223411), we get a palindrome (2264444622).

The spelling of 1143221211 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, two hundred eleven".