32100000221 has 2 divisors, whose sum is σ = 32100000222. Its totient is φ = 32100000220.

The previous prime is 32100000203. The next prime is 32100000223. The reversal of 32100000221 is 12200000123.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23758831321 + 8341168900 = 154139^2 + 91330^2 .

It is an emirp because it is prime and its reverse (12200000123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32100000221 - 2⁶ = 32100000157 is a prime.

Together with 32100000223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32100000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16050000110 + 16050000111.

It is an arithmetic number, because the mean of its divisors is an integer number (16050000111).

Almost surely, 2^32100000221 is an apocalyptic number.

It is an amenable number.

32100000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32100000221 is an equidigital number, since it uses as much as digits as its factorization.

32100000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 32100000221 its reverse (12200000123), we get a palindrome (44300000344).

The spelling of 32100000221 in words is "thirty-two billion, one hundred million, two hundred twenty-one", and thus it is an aban number.