32130212221 has 2 divisors, whose sum is σ = 32130212222. Its totient is φ = 32130212220.

The previous prime is 32130212183. The next prime is 32130212243. The reversal of 32130212221 is 12221203123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24292651321 + 7837560900 = 155861^2 + 88530^2 .

It is a cyclic number.

It is not a de Polignac number, because 32130212221 - 2¹⁷ = 32130081149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32130216221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16065106110 + 16065106111.

It is an arithmetic number, because the mean of its divisors is an integer number (16065106111).

Almost surely, 2^32130212221 is an apocalyptic number.

It is an amenable number.

32130212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32130212221 is an equidigital number, since it uses as much as digits as its factorization.

32130212221 is an evil number, because the sum of its binary digits is even.

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

Adding to 32130212221 its reverse (12221203123), we get a palindrome (44351415344).

The spelling of 32130212221 in words is "thirty-two billion, one hundred thirty million, two hundred twelve thousand, two hundred twenty-one".