21300442211 has 2 divisors, whose sum is σ = 21300442212. Its totient is φ = 21300442210.

The previous prime is 21300442183. The next prime is 21300442217. The reversal of 21300442211 is 11224400312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300442211 - 2³⁰ = 20226700387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21300442217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650221105 + 10650221106.

It is an arithmetic number, because the mean of its divisors is an integer number (10650221106).

Almost surely, 2^21300442211 is an apocalyptic number.

21300442211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300442211 is an equidigital number, since it uses as much as digits as its factorization.

21300442211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21300442211 its reverse (11224400312), we get a palindrome (32524842523).

The spelling of 21300442211 in words is "twenty-one billion, three hundred million, four hundred forty-two thousand, two hundred eleven".