21321033211 has 2 divisors, whose sum is σ = 21321033212. Its totient is φ = 21321033210.

The previous prime is 21321033199. The next prime is 21321033289. The reversal of 21321033211 is 11233012312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321033211 - 2¹⁵ = 21321000443 is a prime.

It is not a weakly prime, because it can be changed into another prime (21321033311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660516605 + 10660516606.

It is an arithmetic number, because the mean of its divisors is an integer number (10660516606).

Almost surely, 2^21321033211 is an apocalyptic number.

21321033211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321033211 is an equidigital number, since it uses as much as digits as its factorization.

21321033211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21321033211 its reverse (11233012312), we get a palindrome (32554045523).

The spelling of 21321033211 in words is "twenty-one billion, three hundred twenty-one million, thirty-three thousand, two hundred eleven".