213323203021121 has 4 divisors (see below), whose sum is σ = 213345380305200. Its totient is φ = 213301025737044.

The previous prime is 213323203021073. The next prime is 213323203021139. The reversal of 213323203021121 is 121120302323312.

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 a de Polignac number, because none of the positive numbers 2^k-213323203021121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213323203021171) 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, 11088627611 + ... + 11088646848.

It is an arithmetic number, because the mean of its divisors is an integer number (53336345076300).

Almost surely, 2^{213323203021121} is an apocalyptic number.

It is an amenable number.

213323203021121 is a deficient number, since it is larger than the sum of its proper divisors (22177284079).

213323203021121 is an equidigital number, since it uses as much as digits as its factorization.

213323203021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22177284078.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 213323203021121 its reverse (121120302323312), we get a palindrome (334443505344433).

The spelling of 213323203021121 in words is "two hundred thirteen trillion, three hundred twenty-three billion, two hundred three million, twenty-one thousand, one hundred twenty-one".