32212221021 has 20 divisors (see below), whose sum is σ = 48152783932. Its totient is φ = 21459955968.

The previous prime is 32212221011. The next prime is 32212221023. The reversal of 32212221021 is 12012221223.

It can be written as a sum of positive squares in 2 ways, for example, as 16401924900 + 15810296121 = 128070^2 + 125739^2 .

It is not a de Polignac number, because 32212221021 - 2¹⁰ = 32212219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32212220985 and 32212221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32212221023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19156 + ... + 254541.

Almost surely, 2^32212221021 is an apocalyptic number.

It is an amenable number.

32212221021 is a deficient number, since it is larger than the sum of its proper divisors (15940562911).

32212221021 is a wasteful number, since it uses less digits than its factorization.

32212221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275162 (or 275153 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 32212221021 its reverse (12012221223), we get a palindrome (44224442244).

The spelling of 32212221021 in words is "thirty-two billion, two hundred twelve million, two hundred twenty-one thousand, twenty-one".