212221220132213 has 4 divisors (see below), whose sum is σ = 214409067762540. Its totient is φ = 210033372501888.

The previous prime is 212221220132209. The next prime is 212221220132221. The reversal of 212221220132213 is 312231022122212.

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 47717175848644 + 164504044283569 = 6907762^2 + 12825913^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221220132213 - 2² = 212221220132209 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 (212221520132213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093923815018 + ... + 1093923815211.

It is an arithmetic number, because the mean of its divisors is an integer number (53602266940635).

Almost surely, 2^{212221220132213} is an apocalyptic number.

It is an amenable number.

212221220132213 is a deficient number, since it is larger than the sum of its proper divisors (2187847630327).

212221220132213 is an equidigital number, since it uses as much as digits as its factorization.

212221220132213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187847630326.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 212221220132213 its reverse (312231022122212), we get a palindrome (524452242254425).

The spelling of 212221220132213 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred thirty-two thousand, two hundred thirteen".