213223020200021 has 8 divisors (see below), whose sum is σ = 229625062820664. Its totient is φ = 196821016413120.

The previous prime is 213223020199997. The next prime is 213223020200033. The reversal of 213223020200021 is 120002020322312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38501838850225 + 174721181349796 = 6204985^2 + 13218214^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 213223020200021 - 2³⁸ = 212948142293077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213223020199966 and 213223020200002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223020200081) 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, 2239895 + ... + 20771691.

It is an arithmetic number, because the mean of its divisors is an integer number (28703132852583).

Almost surely, 2^{213223020200021} is an apocalyptic number.

It is an amenable number.

213223020200021 is a deficient number, since it is larger than the sum of its proper divisors (16402042620643).

213223020200021 is a wasteful number, since it uses less digits than its factorization.

213223020200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416871.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 213223020200021 its reverse (120002020322312), we get a palindrome (333225040522333).

The spelling of 213223020200021 in words is "two hundred thirteen trillion, two hundred twenty-three billion, twenty million, two hundred thousand, twenty-one".