32020021221 has 8 divisors (see below), whose sum is σ = 42722194944. Its totient is φ = 21332264160.

The previous prime is 32020021211. The next prime is 32020021249. The reversal of 32020021221 is 12212002023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 32020021221 - 2²² = 32015826917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32020021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32020021211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3598981 + ... + 3607866.

It is an arithmetic number, because the mean of its divisors is an integer number (5340274368).

Almost surely, 2^32020021221 is an apocalyptic number.

It is an amenable number.

32020021221 is a deficient number, since it is larger than the sum of its proper divisors (10702173723).

32020021221 is a wasteful number, since it uses less digits than its factorization.

32020021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208331.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 32020021221 its reverse (12212002023), we get a palindrome (44232023244).

The spelling of 32020021221 in words is "thirty-two billion, twenty million, twenty-one thousand, two hundred twenty-one".