12101143 has 4 divisors (see below), whose sum is σ = 12154680. Its totient is φ = 12047608.

The previous prime is 12101123. The next prime is 12101147. The reversal of 12101143 is 34110121.

12101143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101143 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 (12101147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26428 + ... + 26881.

It is an arithmetic number, because the mean of its divisors is an integer number (3038670).

Almost surely, 2^12101143 is an apocalyptic number.

12101143 is a deficient number, since it is larger than the sum of its proper divisors (53537).

12101143 is an equidigital number, since it uses as much as digits as its factorization.

12101143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53536.

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

The square root of 12101143 is about 3478.6697170039. The cubic root of 12101143 is about 229.5842710698.

Adding to 12101143 its reverse (34110121), we get a palindrome (46211264).

The spelling of 12101143 in words is "twelve million, one hundred one thousand, one hundred forty-three".