212002212121221 has 32 divisors (see below), whose sum is σ = 283710656839680. Its totient is φ = 140815426507776.

The previous prime is 212002212121211. The next prime is 212002212121237. The reversal of 212002212121221 is 122121212200212.

It is not a de Polignac number, because 212002212121221 - 2⁶ = 212002212121157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002212121211) 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, 2379676540 + ... + 2379765626.

It is an arithmetic number, because the mean of its divisors is an integer number (8865958026240).

Almost surely, 2^{212002212121221} is an apocalyptic number.

It is an amenable number.

212002212121221 is a deficient number, since it is larger than the sum of its proper divisors (71708444718459).

212002212121221 is a wasteful number, since it uses less digits than its factorization.

212002212121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92253.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212002212121221 its reverse (122121212200212), we get a palindrome (334123424321433).

The spelling of 212002212121221 in words is "two hundred twelve trillion, two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".