212224404013 has 4 divisors (see below), whose sum is σ = 219542486940. Its totient is φ = 204906321088.

The previous prime is 212224403981. The next prime is 212224404037. The reversal of 212224404013 is 310404422212.

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 135820257444 + 76404146569 = 368538^2 + 276413^2 .

It is a cyclic number.

It is not a de Polignac number, because 212224404013 - 2⁵ = 212224403981 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 (212224404043) 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, 3659041420 + ... + 3659041477.

It is an arithmetic number, because the mean of its divisors is an integer number (54885621735).

Almost surely, 2^212224404013 is an apocalyptic number.

It is an amenable number.

212224404013 is a deficient number, since it is larger than the sum of its proper divisors (7318082927).

212224404013 is an equidigital number, since it uses as much as digits as its factorization.

212224404013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318082926.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 212224404013 its reverse (310404422212), we get a palindrome (522628826225).

The spelling of 212224404013 in words is "two hundred twelve billion, two hundred twenty-four million, four hundred four thousand, thirteen".