213242224421 has 4 divisors (see below), whose sum is σ = 213262373100. Its totient is φ = 213222075744.

The previous prime is 213242224417. The next prime is 213242224451. The reversal of 213242224421 is 124422242312.

213242224421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65528832196 + 147713392225 = 255986^2 + 384335^2 .

It is a cyclic number.

It is not a de Polignac number, because 213242224421 - 2² = 213242224417 is a prime.

It is a super-2 number, since 2×213242224421² (a number of 23 digits) contains 22 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 (213242224451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10058456 + ... + 10079633.

It is an arithmetic number, because the mean of its divisors is an integer number (53315593275).

Almost surely, 2^213242224421 is an apocalyptic number.

It is an amenable number.

213242224421 is a deficient number, since it is larger than the sum of its proper divisors (20148679).

213242224421 is a wasteful number, since it uses less digits than its factorization.

213242224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20148678.

The product of its digits is 12288, while the sum is 29.

Adding to 213242224421 its reverse (124422242312), we get a palindrome (337664466733).

The spelling of 213242224421 in words is "two hundred thirteen billion, two hundred forty-two million, two hundred twenty-four thousand, four hundred twenty-one".