212221322001 has 20 divisors (see below), whose sum is σ = 341408282292. Its totient is φ = 130597735968.

The previous prime is 212221321999. The next prime is 212221322101. The reversal of 212221322001 is 100223122212.

212221322001 is a `hidden beast` number, since 212 + 221 + 32 + 200 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 141424884225 + 70796437776 = 376065^2 + 266076^2 .

It is not a de Polignac number, because 212221322001 - 2¹ = 212221321999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212221322101) 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, 100768806 + ... + 100770911.

Almost surely, 2^212221322001 is an apocalyptic number.

It is an amenable number.

212221322001 is a deficient number, since it is larger than the sum of its proper divisors (129186960291).

212221322001 is a wasteful number, since it uses less digits than its factorization.

212221322001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201539742 (or 201539733 counting only the distinct ones).

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

Adding to 212221322001 its reverse (100223122212), we get a palindrome (312444444213).

The spelling of 212221322001 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-two thousand, one".