212221120213 has 4 divisors (see below), whose sum is σ = 212279862028. Its totient is φ = 212162378400.

The previous prime is 212221120091. The next prime is 212221120301. The reversal of 212221120213 is 312021122212.

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 9521270929 + 202699849284 = 97577^2 + 450222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221120213 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 (212221120913) 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, 29365488 + ... + 29372713.

It is an arithmetic number, because the mean of its divisors is an integer number (53069965507).

Almost surely, 2^212221120213 is an apocalyptic number.

It is an amenable number.

212221120213 is a deficient number, since it is larger than the sum of its proper divisors (58741815).

212221120213 is an equidigital number, since it uses as much as digits as its factorization.

212221120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58741814.

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

Adding to 212221120213 its reverse (312021122212), we get a palindrome (524242242425).

The spelling of 212221120213 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred twenty thousand, two hundred thirteen".