213204400221 has 8 divisors (see below), whose sum is σ = 285915728160. Its totient is φ = 141314669552.

The previous prime is 213204400169. The next prime is 213204400223. The reversal of 213204400221 is 122004402312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213204400221 is a prime.

It is a super-2 number, since 2×213204400221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213204400223) 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, 205398711 + ... + 205399748.

It is an arithmetic number, because the mean of its divisors is an integer number (35739466020).

Almost surely, 2^213204400221 is an apocalyptic number.

It is an amenable number.

213204400221 is a deficient number, since it is larger than the sum of its proper divisors (72711327939).

213204400221 is a wasteful number, since it uses less digits than its factorization.

213204400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410798635.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 213204400221 its reverse (122004402312), we get a palindrome (335208802533).

The spelling of 213204400221 in words is "two hundred thirteen billion, two hundred four million, four hundred thousand, two hundred twenty-one".