213204311321 has 16 divisors (see below), whose sum is σ = 220090362624. Its totient is φ = 206423288064.

The previous prime is 213204311311. The next prime is 213204311371. The reversal of 213204311321 is 123113402312.

It is a cyclic number.

It is not a de Polignac number, because 213204311321 - 2¹⁴ = 213204294937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213204311311) 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, 2739275 + ... + 2816031.

It is an arithmetic number, because the mean of its divisors is an integer number (13755647664).

Almost surely, 2^213204311321 is an apocalyptic number.

It is an amenable number.

213204311321 is a deficient number, since it is larger than the sum of its proper divisors (6886051303).

213204311321 is a wasteful number, since it uses less digits than its factorization.

213204311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77440.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 213204311321 its reverse (123113402312), we get a palindrome (336317713633).

Subtracting from 213204311321 its reverse (123113402312), we obtain a palindrome (90090909009).

The spelling of 213204311321 in words is "two hundred thirteen billion, two hundred four million, three hundred eleven thousand, three hundred twenty-one".