213010220221 has 4 divisors (see below), whose sum is σ = 214317031552. Its totient is φ = 211703408892.

The previous prime is 213010220219. The next prime is 213010220233. The reversal of 213010220221 is 122022010312.

It is a happy number.

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 213010220221 - 2¹ = 213010220219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213010220195 and 213010220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213010220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653405421 + ... + 653405746.

It is an arithmetic number, because the mean of its divisors is an integer number (53579257888).

Almost surely, 2^213010220221 is an apocalyptic number.

It is an amenable number.

213010220221 is a deficient number, since it is larger than the sum of its proper divisors (1306811331).

213010220221 is a wasteful number, since it uses less digits than its factorization.

213010220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306811330.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 213010220221 its reverse (122022010312), we get a palindrome (335032230533).

The spelling of 213010220221 in words is "two hundred thirteen billion, ten million, two hundred twenty thousand, two hundred twenty-one".