32001231221 has 2 divisors, whose sum is σ = 32001231222. Its totient is φ = 32001231220.

The previous prime is 32001231187. The next prime is 32001231247. The reversal of 32001231221 is 12213210023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32000200996 + 1030225 = 178886^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001231221 - 2¹⁰ = 32001230197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32001231221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32001231271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16000615610 + 16000615611.

It is an arithmetic number, because the mean of its divisors is an integer number (16000615611).

Almost surely, 2^32001231221 is an apocalyptic number.

It is an amenable number.

32001231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32001231221 is an equidigital number, since it uses as much as digits as its factorization.

32001231221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 32001231221 its reverse (12213210023), we get a palindrome (44214441244).

The spelling of 32001231221 in words is "thirty-two billion, one million, two hundred thirty-one thousand, two hundred twenty-one".