32220344021 has 4 divisors (see below), whose sum is σ = 32748546444. Its totient is φ = 31692141600.

The previous prime is 32220344017. The next prime is 32220344027. The reversal of 32220344021 is 12044302223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12044302223 = 193 ⋅62405711.

It can be written as a sum of positive squares in 2 ways, for example, as 16870372996 + 15349971025 = 129886^2 + 123895^2 .

It is a cyclic number.

It is not a de Polignac number, because 32220344021 - 2² = 32220344017 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 (32220344027) 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, 264101120 + ... + 264101241.

It is an arithmetic number, because the mean of its divisors is an integer number (8187136611).

Almost surely, 2^32220344021 is an apocalyptic number.

It is an amenable number.

32220344021 is a deficient number, since it is larger than the sum of its proper divisors (528202423).

32220344021 is an equidigital number, since it uses as much as digits as its factorization.

32220344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528202422.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 32220344021 its reverse (12044302223), we get a palindrome (44264646244).

The spelling of 32220344021 in words is "thirty-two billion, two hundred twenty million, three hundred forty-four thousand, twenty-one".