212222001321 has 32 divisors (see below), whose sum is σ = 343129530240. Its totient is φ = 128565216000.

The previous prime is 212222001317. The next prime is 212222001331. The reversal of 212222001321 is 123100222212.

212222001321 is a `hidden beast` number, since 2 + 122 + 220 + 0 + 1 + 321 = 666.

It is not a de Polignac number, because 212222001321 - 2² = 212222001317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212222001294 and 212222001303.

It is not an unprimeable number, because it can be changed into a prime (212222001331) 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 31 ways as a sum of consecutive naturals, for example, 561421 + ... + 860021.

It is an arithmetic number, because the mean of its divisors is an integer number (10722797820).

Almost surely, 2^212222001321 is an apocalyptic number.

It is an amenable number.

212222001321 is a deficient number, since it is larger than the sum of its proper divisors (130907528919).

212222001321 is a wasteful number, since it uses less digits than its factorization.

212222001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301014 (or 301008 counting only the distinct ones).

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

Adding to 212222001321 its reverse (123100222212), we get a palindrome (335322223533).

The spelling of 212222001321 in words is "two hundred twelve billion, two hundred twenty-two million, one thousand, three hundred twenty-one".