12011143 has 2 divisors, whose sum is σ = 12011144. Its totient is φ = 12011142.

The previous prime is 12011123. The next prime is 12011149. The reversal of 12011143 is 34111021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12011143 - 2¹³ = 12002951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005571 + 6005572.

It is an arithmetic number, because the mean of its divisors is an integer number (6005572).

Almost surely, 2^12011143 is an apocalyptic number.

12011143 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011143 is an equidigital number, since it uses as much as digits as its factorization.

12011143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 12011143 is about 3465.7095954508. The cubic root of 12011143 is about 229.0136907587.

Adding to 12011143 its reverse (34111021), we get a palindrome (46122164).

The spelling of 12011143 in words is "twelve million, eleven thousand, one hundred forty-three".