21141271 has 2 divisors, whose sum is σ = 21141272. Its totient is φ = 21141270.

The previous prime is 21141259. The next prime is 21141299. The reversal of 21141271 is 17214112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21141271 - 2⁷ = 21141143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21141371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570635 + 10570636.

It is an arithmetic number, because the mean of its divisors is an integer number (10570636).

Almost surely, 2^21141271 is an apocalyptic number.

21141271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141271 is an equidigital number, since it uses as much as digits as its factorization.

21141271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 19.

The square root of 21141271 is about 4597.9637884611. The cubic root of 21141271 is about 276.5096957993.

Adding to 21141271 its reverse (17214112), we get a palindrome (38355383).

It can be divided in two parts, 21141 and 271, that added together give a palindrome (21412).

The spelling of 21141271 in words is "twenty-one million, one hundred forty-one thousand, two hundred seventy-one".