1143122211 has 72 divisors (see below), whose sum is σ = 2196466272. Its totient is φ = 558835200.

The previous prime is 1143122207. The next prime is 1143122219. The reversal of 1143122211 is 1122213411.

1143122211 is a `hidden beast` number, since 1 + 1 + 431 + 22 + 211 = 666.

It is not a de Polignac number, because 1143122211 - 2² = 1143122207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143122219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 125181 + ... + 134001.

It is an arithmetic number, because the mean of its divisors is an integer number (30506476).

Almost surely, 2^1143122211 is an apocalyptic number.

1143122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1143122211 is a deficient number, since it is larger than the sum of its proper divisors (1053344061).

1143122211 is a wasteful number, since it uses less digits than its factorization.

1143122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8873 (or 8859 counting only the distinct ones).

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

The square root of 1143122211 is about 33810.0903725500. The cubic root of 1143122211 is about 1045.5967413485.

Adding to 1143122211 its reverse (1122213411), we get a palindrome (2265335622).

The spelling of 1143122211 in words is "one billion, one hundred forty-three million, one hundred twenty-two thousand, two hundred eleven".