21341191 has 2 divisors, whose sum is σ = 21341192. Its totient is φ = 21341190.

The previous prime is 21341183. The next prime is 21341249. The reversal of 21341191 is 19114312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21341191 - 2³ = 21341183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21341141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670595 + 10670596.

It is an arithmetic number, because the mean of its divisors is an integer number (10670596).

Almost surely, 2^21341191 is an apocalyptic number.

21341191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341191 is an equidigital number, since it uses as much as digits as its factorization.

21341191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 21341191 is about 4619.6526925733. The cubic root of 21341191 is about 277.3785568215.

The spelling of 21341191 in words is "twenty-one million, three hundred forty-one thousand, one hundred ninety-one".