21233130302221 has 2 divisors, whose sum is σ = 21233130302222. Its totient is φ = 21233130302220.

The previous prime is 21233130302213. The next prime is 21233130302281. The reversal of 21233130302221 is 12220303133212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12420479032900 + 8812651269321 = 3524270^2 + 2968611^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233130302221 - 2³ = 21233130302213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233130302201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616565151110 + 10616565151111.

It is an arithmetic number, because the mean of its divisors is an integer number (10616565151111).

Almost surely, 2^{21233130302221} is an apocalyptic number.

It is an amenable number.

21233130302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233130302221 is an equidigital number, since it uses as much as digits as its factorization.

21233130302221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21233130302221 its reverse (12220303133212), we get a palindrome (33453433435433).

The spelling of 21233130302221 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred thirty million, three hundred two thousand, two hundred twenty-one".