213130220221 has 4 divisors (see below), whose sum is σ = 216311268352. Its totient is φ = 209949172092.

The previous prime is 213130220197. The next prime is 213130220267. The reversal of 213130220221 is 122022031312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213130220221 - 2¹⁷ = 213130089149 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 (213130220021) 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, 1590523965 + ... + 1590524098.

It is an arithmetic number, because the mean of its divisors is an integer number (54077817088).

Almost surely, 2^213130220221 is an apocalyptic number.

It is an amenable number.

213130220221 is a deficient number, since it is larger than the sum of its proper divisors (3181048131).

213130220221 is an equidigital number, since it uses as much as digits as its factorization.

213130220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181048130.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 213130220221 its reverse (122022031312), we get a palindrome (335152251533).

The spelling of 213130220221 in words is "two hundred thirteen billion, one hundred thirty million, two hundred twenty thousand, two hundred twenty-one".