21204132211 has 2 divisors, whose sum is σ = 21204132212. Its totient is φ = 21204132210.

The previous prime is 21204132199. The next prime is 21204132227. The reversal of 21204132211 is 11223140212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21204132211 - 2¹⁵ = 21204099443 is a prime.

It is not a weakly prime, because it can be changed into another prime (21204132241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10602066105 + 10602066106.

It is an arithmetic number, because the mean of its divisors is an integer number (10602066106).

Almost surely, 2^21204132211 is an apocalyptic number.

21204132211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21204132211 is an equidigital number, since it uses as much as digits as its factorization.

21204132211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21204132211 its reverse (11223140212), we get a palindrome (32427272423).

The spelling of 21204132211 in words is "twenty-one billion, two hundred four million, one hundred thirty-two thousand, two hundred eleven".