213120002321 has 4 divisors (see below), whose sum is σ = 213213192192. Its totient is φ = 213026812452.

The previous prime is 213120002243. The next prime is 213120002369. The reversal of 213120002321 is 123200021312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213120002321 - 2¹⁸ = 213119740177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213120002321.

It is not an unprimeable number, because it can be changed into a prime (213120001321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46591505 + ... + 46596078.

It is an arithmetic number, because the mean of its divisors is an integer number (53303298048).

Almost surely, 2^213120002321 is an apocalyptic number.

It is an amenable number.

213120002321 is a deficient number, since it is larger than the sum of its proper divisors (93189871).

213120002321 is an equidigital number, since it uses as much as digits as its factorization.

213120002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93189870.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 213120002321 its reverse (123200021312), we get a palindrome (336320023633).

The spelling of 213120002321 in words is "two hundred thirteen billion, one hundred twenty million, two thousand, three hundred twenty-one".