32421020221 has 4 divisors (see below), whose sum is σ = 32448016444. Its totient is φ = 32394024000.

The previous prime is 32421020213. The next prime is 32421020237. The reversal of 32421020221 is 12202012423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12202012423 = 131 ⋅93145133.

It can be written as a sum of positive squares in 2 ways, for example, as 4536696025 + 27884324196 = 67355^2 + 166986^2 .

It is a cyclic number.

It is not a de Polignac number, because 32421020221 - 2³ = 32421020213 is a prime.

It is a super-2 number, since 2×32421020221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32421020251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13496310 + ... + 13498711.

It is an arithmetic number, because the mean of its divisors is an integer number (8112004111).

Almost surely, 2^32421020221 is an apocalyptic number.

It is an amenable number.

32421020221 is a deficient number, since it is larger than the sum of its proper divisors (26996223).

32421020221 is a wasteful number, since it uses less digits than its factorization.

32421020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26996222.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 32421020221 its reverse (12202012423), we get a palindrome (44623032644).

The spelling of 32421020221 in words is "thirty-two billion, four hundred twenty-one million, twenty thousand, two hundred twenty-one".