21341011 has 4 divisors (see below), whose sum is σ = 21350952. Its totient is φ = 21331072.

The previous prime is 21340931. The next prime is 21341017. The reversal of 21341011 is 11014312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21341011 - 2⁷ = 21340883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21340982 and 21341000.

It is not an unprimeable number, because it can be changed into a prime (21341017) 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, 265 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (5337738).

Almost surely, 2^21341011 is an apocalyptic number.

21341011 is a deficient number, since it is larger than the sum of its proper divisors (9941).

21341011 is an equidigital number, since it uses as much as digits as its factorization.

21341011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9940.

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

The square root of 21341011 is about 4619.6332105482. The cubic root of 21341011 is about 277.3777769794.

Adding to 21341011 its reverse (11014312), we get a palindrome (32355323).

The spelling of 21341011 in words is "twenty-one million, three hundred forty-one thousand, eleven".