212221320213 has 8 divisors (see below), whose sum is σ = 323384868928. Its totient is φ = 121269325824.

The previous prime is 212221320149. The next prime is 212221320251. The reversal of 212221320213 is 312023122212.

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

It is not a de Polignac number, because 212221320213 - 2⁶ = 212221320149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10105777153 = 212221320213 / (2 + 1 + 2 + 2 + 2 + 1 + 3 + 2 + 0 + 2 + 1 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212221320213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221320293) 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, 5052888556 + ... + 5052888597.

It is an arithmetic number, because the mean of its divisors is an integer number (40423108616).

Almost surely, 2^212221320213 is an apocalyptic number.

It is an amenable number.

212221320213 is a deficient number, since it is larger than the sum of its proper divisors (111163548715).

212221320213 is a wasteful number, since it uses less digits than its factorization.

212221320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105777163.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212221320213 its reverse (312023122212), we get a palindrome (524244442425).

The spelling of 212221320213 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, two hundred thirteen".