11211143 has 16 divisors (see below), whose sum is σ = 12643776. Its totient is φ = 9884160.

The previous prime is 11211133. The next prime is 11211169. The reversal of 11211143 is 34111211.

11211143 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11211143 - 2¹⁸ = 10948999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211103) 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 15 ways as a sum of consecutive naturals, for example, 20453 + ... + 20993.

It is an arithmetic number, because the mean of its divisors is an integer number (790236).

Almost surely, 2^11211143 is an apocalyptic number.

11211143 is a deficient number, since it is larger than the sum of its proper divisors (1432633).

11211143 is a wasteful number, since it uses less digits than its factorization.

11211143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its digits is 24, while the sum is 14.

The square root of 11211143 is about 3348.3044963085. The cubic root of 11211143 is about 223.8119635301.

Adding to 11211143 its reverse (34111211), we get a palindrome (45322354).

The spelling of 11211143 in words is "eleven million, two hundred eleven thousand, one hundred forty-three".