212021122213 has 4 divisors (see below), whose sum is σ = 212022157248. Its totient is φ = 212020087180.

The previous prime is 212021122177. The next prime is 212021122259. The reversal of 212021122213 is 312221120212.

212021122213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021122813) 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 3 ways as a sum of consecutive naturals, for example, 95581 + ... + 658162.

It is an arithmetic number, because the mean of its divisors is an integer number (53005539312).

Almost surely, 2^212021122213 is an apocalyptic number.

It is an amenable number.

212021122213 is a deficient number, since it is larger than the sum of its proper divisors (1035035).

212021122213 is an equidigital number, since it uses as much as digits as its factorization.

212021122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035034.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212021122213 its reverse (312221120212), we get a palindrome (524242242425).

The spelling of 212021122213 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred thirteen".