12211143 has 16 divisors (see below), whose sum is σ = 18988800. Its totient is φ = 6977208.

The previous prime is 12211141. The next prime is 12211159. The reversal of 12211143 is 34111221.

It is not a de Polignac number, because 12211143 - 2¹ = 12211141 is a prime.

It is a super-2 number, since 2×12211143² = 298224026732898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4905 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (1186800).

Almost surely, 2^12211143 is an apocalyptic number.

12211143 is a deficient number, since it is larger than the sum of its proper divisors (6777657).

12211143 is an equidigital number, since it uses as much as digits as its factorization.

12211143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11891 (or 11877 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 12211143 is about 3494.4445910616. Note that the first 3 decimals coincide. The cubic root of 12211143 is about 230.2778180364.

Adding to 12211143 its reverse (34111221), we get a palindrome (46322364).

The spelling of 12211143 in words is "twelve million, two hundred eleven thousand, one hundred forty-three".