12213213068821 has 8 divisors (see below), whose sum is σ = 12511219289688. Its totient is φ = 11915212704000.

The previous prime is 12213213068809. The next prime is 12213213068893. The reversal of 12213213068821 is 12886031231221.

It can be written as a sum of positive squares in 4 ways, for example, as 1806298368196 + 10406914700625 = 1343986^2 + 3225975^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-12213213068821 is a prime.

It is a super-4 number, since 4×12213213068821⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213213068801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915961 + ... + 5738401.

It is an arithmetic number, because the mean of its divisors is an integer number (1563902411211).

Almost surely, 2^{12213213068821} is an apocalyptic number.

It is an amenable number.

12213213068821 is a deficient number, since it is larger than the sum of its proper divisors (298006220867).

12213213068821 is a wasteful number, since it uses less digits than its factorization.

12213213068821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928023.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 12213213068821 in words is "twelve trillion, two hundred thirteen billion, two hundred thirteen million, sixty-eight thousand, eight hundred twenty-one".