213024430221 has 16 divisors (see below), whose sum is σ = 292015370304. Its totient is φ = 138032947584.

The previous prime is 213024430219. The next prime is 213024430247. The reversal of 213024430221 is 122034420312.

It is a happy number.

It is not a de Polignac number, because 213024430221 - 2¹ = 213024430219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213024430191 and 213024430200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213024430211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901111 + ... + 1112676.

It is an arithmetic number, because the mean of its divisors is an integer number (18250960644).

Almost surely, 2^213024430221 is an apocalyptic number.

It is an amenable number.

213024430221 is a deficient number, since it is larger than the sum of its proper divisors (78990940083).

213024430221 is a wasteful number, since it uses less digits than its factorization.

213024430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014780.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 213024430221 its reverse (122034420312), we get a palindrome (335058850533).

Subtracting from 213024430221 its reverse (122034420312), we obtain a palindrome (90990009909).

The spelling of 213024430221 in words is "two hundred thirteen billion, twenty-four million, four hundred thirty thousand, two hundred twenty-one".