212001200220221 has 32 divisors (see below), whose sum is σ = 218375012620800. Its totient is φ = 205687549624320.

The previous prime is 212001200220217. The next prime is 212001200220247. The reversal of 212001200220221 is 122022002100212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212001200220221 - 2² = 212001200220217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212001200220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001200220521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30863470175 + ... + 30863477043.

It is an arithmetic number, because the mean of its divisors is an integer number (6824219144400).

Almost surely, 2^{212001200220221} is an apocalyptic number.

It is an amenable number.

212001200220221 is a deficient number, since it is larger than the sum of its proper divisors (6373812400579).

212001200220221 is a wasteful number, since it uses less digits than its factorization.

212001200220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11549.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212001200220221 its reverse (122022002100212), we get a palindrome (334023202320433).

The spelling of 212001200220221 in words is "two hundred twelve trillion, one billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".