21141611 has 2 divisors, whose sum is σ = 21141612. Its totient is φ = 21141610.

The previous prime is 21141607. The next prime is 21141629. The reversal of 21141611 is 11614112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21141611 - 2² = 21141607 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21141611.

It is not a weakly prime, because it can be changed into another prime (21141641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570805 + 10570806.

It is an arithmetic number, because the mean of its divisors is an integer number (10570806).

Almost surely, 2^21141611 is an apocalyptic number.

21141611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141611 is an equidigital number, since it uses as much as digits as its factorization.

21141611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 17.

The square root of 21141611 is about 4598.0007612005. Note that the first 3 decimals coincide. The cubic root of 21141611 is about 276.5111780942.

Adding to 21141611 its reverse (11614112), we get a palindrome (32755723).

The spelling of 21141611 in words is "twenty-one million, one hundred forty-one thousand, six hundred eleven".