213442122221 has 8 divisors (see below), whose sum is σ = 213812376960. Its totient is φ = 213072186528.

The previous prime is 213442122217. The next prime is 213442122227. The reversal of 213442122221 is 122221244312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213442122221 - 2² = 213442122217 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 (213442122227) 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, 1279385 + ... + 1436561.

It is an arithmetic number, because the mean of its divisors is an integer number (26726547120).

Almost surely, 2^213442122221 is an apocalyptic number.

It is an amenable number.

213442122221 is a deficient number, since it is larger than the sum of its proper divisors (370254739).

213442122221 is a wasteful number, since it uses less digits than its factorization.

213442122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159523.

The product of its digits is 3072, while the sum is 26.

Adding to 213442122221 its reverse (122221244312), we get a palindrome (335663366533).

The spelling of 213442122221 in words is "two hundred thirteen billion, four hundred forty-two million, one hundred twenty-two thousand, two hundred twenty-one".