32013131221 has 4 divisors (see below), whose sum is σ = 32103820332. Its totient is φ = 31922442112.

The previous prime is 32013131219. The next prime is 32013131251. The reversal of 32013131221 is 12213131023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4087044900 + 27926086321 = 63930^2 + 167111^2 .

It is a cyclic number.

It is not a de Polignac number, because 32013131221 - 2¹ = 32013131219 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 (32013131251) 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 in 3 ways as a sum of consecutive naturals, for example, 45344026 + ... + 45344731.

It is an arithmetic number, because the mean of its divisors is an integer number (8025955083).

Almost surely, 2^32013131221 is an apocalyptic number.

It is an amenable number.

32013131221 is a deficient number, since it is larger than the sum of its proper divisors (90689111).

32013131221 is an equidigital number, since it uses as much as digits as its factorization.

32013131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90689110.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 32013131221 its reverse (12213131023), we get a palindrome (44226262244).

The spelling of 32013131221 in words is "thirty-two billion, thirteen million, one hundred thirty-one thousand, two hundred twenty-one".