32221312220221 has 2 divisors, whose sum is σ = 32221312220222. Its totient is φ = 32221312220220.

The previous prime is 32221312220159. The next prime is 32221312220243. The reversal of 32221312220221 is 12202221312223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16780451996025 + 15440860224196 = 4096395^2 + 3929486^2 .

It is a cyclic number.

It is not a de Polignac number, because 32221312220221 - 2⁹ = 32221312219709 is a prime.

It is a super-2 number, since 2×32221312220221² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32221312220821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16110656110110 + 16110656110111.

It is an arithmetic number, because the mean of its divisors is an integer number (16110656110111).

Almost surely, 2^{32221312220221} is an apocalyptic number.

It is an amenable number.

32221312220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32221312220221 is an equidigital number, since it uses as much as digits as its factorization.

32221312220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 32221312220221 its reverse (12202221312223), we get a palindrome (44423533532444).

The spelling of 32221312220221 in words is "thirty-two trillion, two hundred twenty-one billion, three hundred twelve million, two hundred twenty thousand, two hundred twenty-one".