21141143 has 2 divisors, whose sum is σ = 21141144. Its totient is φ = 21141142.

The previous prime is 21141139. The next prime is 21141161. The reversal of 21141143 is 34114112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21141143 - 2² = 21141139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21141103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570571 + 10570572.

It is an arithmetic number, because the mean of its divisors is an integer number (10570572).

Almost surely, 2^21141143 is an apocalyptic number.

21141143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141143 is an equidigital number, since it uses as much as digits as its factorization.

21141143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 21141143 is about 4597.9498692352. The cubic root of 21141143 is about 276.5091377548.

Adding to 21141143 its reverse (34114112), we get a palindrome (55255255).

The spelling of 21141143 in words is "twenty-one million, one hundred forty-one thousand, one hundred forty-three".