32312201221 has 4 divisors (see below), whose sum is σ = 32999694912. Its totient is φ = 31624707532.

The previous prime is 32312201219. The next prime is 32312201231. The reversal of 32312201221 is 12210221323.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12210221323 = 509 ⋅23988647.

It is a cyclic number.

It is not a de Polignac number, because 32312201221 - 2¹ = 32312201219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32312201231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343746775 + ... + 343746868.

It is an arithmetic number, because the mean of its divisors is an integer number (8249923728).

Almost surely, 2^32312201221 is an apocalyptic number.

It is an amenable number.

32312201221 is a deficient number, since it is larger than the sum of its proper divisors (687493691).

32312201221 is an equidigital number, since it uses as much as digits as its factorization.

32312201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687493690.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 32312201221 its reverse (12210221323), we get a palindrome (44522422544).

The spelling of 32312201221 in words is "thirty-two billion, three hundred twelve million, two hundred one thousand, two hundred twenty-one".