213230032221 has 8 divisors (see below), whose sum is σ = 284593602304. Its totient is φ = 142009908480.

The previous prime is 213230032217. The next prime is 213230032229. The reversal of 213230032221 is 122230032312.

It is a happy number.

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

It is not a de Polignac number, because 213230032221 - 2² = 213230032217 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 (213230032229) 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, 35858116 + ... + 35864061.

It is an arithmetic number, because the mean of its divisors is an integer number (35574200288).

Almost surely, 2^213230032221 is an apocalyptic number.

It is an amenable number.

213230032221 is a deficient number, since it is larger than the sum of its proper divisors (71363570083).

213230032221 is an equidigital number, since it uses as much as digits as its factorization.

213230032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71723171.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213230032221 its reverse (122230032312), we get a palindrome (335460064533).

Subtracting from 213230032221 its reverse (122230032312), we obtain a palindrome (90999999909).

The spelling of 213230032221 in words is "two hundred thirteen billion, two hundred thirty million, thirty-two thousand, two hundred twenty-one".