21213310201 has 2 divisors, whose sum is σ = 21213310202. Its totient is φ = 21213310200.

The previous prime is 21213310189. The next prime is 21213310211. The reversal of 21213310201 is 10201331212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20363004601 + 850305600 = 142699^2 + 29160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213310201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21213310211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606655100 + 10606655101.

It is an arithmetic number, because the mean of its divisors is an integer number (10606655101).

Almost surely, 2^21213310201 is an apocalyptic number.

It is an amenable number.

21213310201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213310201 is an equidigital number, since it uses as much as digits as its factorization.

21213310201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21213310201 its reverse (10201331212), we get a palindrome (31414641413).

The spelling of 21213310201 in words is "twenty-one billion, two hundred thirteen million, three hundred ten thousand, two hundred one".