32130002221 has 4 divisors (see below), whose sum is σ = 32736228732. Its totient is φ = 31523775712.

The previous prime is 32130002213. The next prime is 32130002287. The reversal of 32130002221 is 12220003123.

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 12533922025 + 19596080196 = 111955^2 + 139986^2 .

It is a cyclic number.

It is not a de Polignac number, because 32130002221 - 2³ = 32130002213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32130002195 and 32130002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32130003221) 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, 303113176 + ... + 303113281.

It is an arithmetic number, because the mean of its divisors is an integer number (8184057183).

Almost surely, 2^32130002221 is an apocalyptic number.

It is an amenable number.

32130002221 is a deficient number, since it is larger than the sum of its proper divisors (606226511).

32130002221 is an equidigital number, since it uses as much as digits as its factorization.

32130002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606226510.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 32130002221 its reverse (12220003123), we get a palindrome (44350005344).

The spelling of 32130002221 in words is "thirty-two billion, one hundred thirty million, two thousand, two hundred twenty-one".