21221200030211 has 2 divisors, whose sum is σ = 21221200030212. Its totient is φ = 21221200030210.

The previous prime is 21221200030187. The next prime is 21221200030259. The reversal of 21221200030211 is 11203000212212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21221200030211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21221200030211.

It is not a weakly prime, because it can be changed into another prime (21221200032211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610600015105 + 10610600015106.

It is an arithmetic number, because the mean of its divisors is an integer number (10610600015106).

Almost surely, 2^{21221200030211} is an apocalyptic number.

21221200030211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221200030211 is an equidigital number, since it uses as much as digits as its factorization.

21221200030211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21221200030211 its reverse (11203000212212), we get a palindrome (32424200242423).

The spelling of 21221200030211 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred million, thirty thousand, two hundred eleven".