32212220221 has 2 divisors, whose sum is σ = 32212220222. Its totient is φ = 32212220220.

The previous prime is 32212220213. The next prime is 32212220231. The reversal of 32212220221 is 12202221223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31821564996 + 390655225 = 178386^2 + 19765^2 .

It is a cyclic number.

It is not a de Polignac number, because 32212220221 - 2³ = 32212220213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32212220231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16106110110 + 16106110111.

It is an arithmetic number, because the mean of its divisors is an integer number (16106110111).

Almost surely, 2^32212220221 is an apocalyptic number.

It is an amenable number.

32212220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32212220221 is an equidigital number, since it uses as much as digits as its factorization.

32212220221 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 19.

Adding to 32212220221 its reverse (12202221223), we get a palindrome (44414441444).

The spelling of 32212220221 in words is "thirty-two billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty-one".