213432302221 has 2 divisors, whose sum is σ = 213432302222. Its totient is φ = 213432302220.

The previous prime is 213432302179. The next prime is 213432302233. The reversal of 213432302221 is 122203234312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186736336900 + 26695965321 = 432130^2 + 163389^2 .

It is a cyclic number.

It is not a de Polignac number, because 213432302221 - 2⁷ = 213432302093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213432302021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106716151110 + 106716151111.

It is an arithmetic number, because the mean of its divisors is an integer number (106716151111).

Almost surely, 2^213432302221 is an apocalyptic number.

It is an amenable number.

213432302221 is a deficient number, since it is larger than the sum of its proper divisors (1).

213432302221 is an equidigital number, since it uses as much as digits as its factorization.

213432302221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 213432302221 its reverse (122203234312), we get a palindrome (335635536533).

The spelling of 213432302221 in words is "two hundred thirteen billion, four hundred thirty-two million, three hundred two thousand, two hundred twenty-one".