212201212021 has 8 divisors (see below), whose sum is σ = 212328986688. Its totient is φ = 212073480000.

The previous prime is 212201211977. The next prime is 212201212037. The reversal of 212201212021 is 120212102212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212201211986 and 212201212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201212081) 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 7 ways as a sum of consecutive naturals, for example, 17105421 + ... + 17117821.

It is an arithmetic number, because the mean of its divisors is an integer number (26541123336).

Almost surely, 2^212201212021 is an apocalyptic number.

It is an amenable number.

212201212021 is a deficient number, since it is larger than the sum of its proper divisors (127774667).

212201212021 is a wasteful number, since it uses less digits than its factorization.

212201212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21323.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212201212021 its reverse (120212102212), we get a palindrome (332413314233).

The spelling of 212201212021 in words is "two hundred twelve billion, two hundred one million, two hundred twelve thousand, twenty-one".