212220121022213 has 4 divisors (see below), whose sum is σ = 212221565659020. Its totient is φ = 212218676385408.

The previous prime is 212220121022141. The next prime is 212220121022269. The reversal of 212220121022213 is 312220121022212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138292849000804 + 73927272021409 = 11759798^2 + 8598097^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220121022213 - 2¹⁰ = 212220121021189 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 (212220121022293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722098028 + ... + 722391861.

It is an arithmetic number, because the mean of its divisors is an integer number (53055391414755).

Almost surely, 2^{212220121022213} is an apocalyptic number.

It is an amenable number.

212220121022213 is a deficient number, since it is larger than the sum of its proper divisors (1444636807).

212220121022213 is a wasteful number, since it uses less digits than its factorization.

212220121022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444636806.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212220121022213 its reverse (312220121022212), we get a palindrome (524440242044425).

Subtracting 212220121022213 from its reverse (312220121022212), we obtain a palindrome (99999999999999).

The spelling of 212220121022213 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twenty-one million, twenty-two thousand, two hundred thirteen".