213223313021 has 16 divisors (see below), whose sum is σ = 223455335040. Its totient is φ = 203071968000.

The previous prime is 213223312999. The next prime is 213223313033. The reversal of 213223313021 is 120313322312.

It is not a de Polignac number, because 213223313021 - 2¹⁸ = 213223050877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223313621) 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, 28682321 + ... + 28689753.

It is an arithmetic number, because the mean of its divisors is an integer number (13965958440).

Almost surely, 2^213223313021 is an apocalyptic number.

It is an amenable number.

213223313021 is a deficient number, since it is larger than the sum of its proper divisors (10232022019).

213223313021 is a wasteful number, since it uses less digits than its factorization.

213223313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12676.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213223313021 its reverse (120313322312), we get a palindrome (333536635333).

The spelling of 213223313021 in words is "two hundred thirteen billion, two hundred twenty-three million, three hundred thirteen thousand, twenty-one".