213404203221 has 48 divisors (see below), whose sum is σ = 325278972480. Its totient is φ = 124256563200.

The previous prime is 213404203193. The next prime is 213404203231. The reversal of 213404203221 is 122302404312.

It is a happy number.

It is not a de Polignac number, because 213404203221 - 2¹³ = 213404195029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213404203191 and 213404203200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213404203231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 840085 + ... + 1064213.

It is an arithmetic number, because the mean of its divisors is an integer number (6776645260).

Almost surely, 2^213404203221 is an apocalyptic number.

It is an amenable number.

213404203221 is a deficient number, since it is larger than the sum of its proper divisors (111874769259).

213404203221 is a wasteful number, since it uses less digits than its factorization.

213404203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224258 (or 224247 counting only the distinct ones).

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

Adding to 213404203221 its reverse (122302404312), we get a palindrome (335706607533).

The spelling of 213404203221 in words is "two hundred thirteen billion, four hundred four million, two hundred three thousand, two hundred twenty-one".