213111230221 has 4 divisors (see below), whose sum is σ = 213174079744. Its totient is φ = 213048380700.

The previous prime is 213111230183. The next prime is 213111230231. The reversal of 213111230221 is 122032111312.

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 213111230221 - 2¹¹ = 213111228173 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 (213111230231) 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, 31419675 + ... + 31426456.

It is an arithmetic number, because the mean of its divisors is an integer number (53293519936).

Almost surely, 2^213111230221 is an apocalyptic number.

It is an amenable number.

213111230221 is a deficient number, since it is larger than the sum of its proper divisors (62849523).

213111230221 is an equidigital number, since it uses as much as digits as its factorization.

213111230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62849522.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 213111230221 its reverse (122032111312), we get a palindrome (335143341533).

The spelling of 213111230221 in words is "two hundred thirteen billion, one hundred eleven million, two hundred thirty thousand, two hundred twenty-one".