213222312321320 has 128 divisors (see below), whose sum is σ = 512678898460800. Its totient is φ = 79572109833216.

The previous prime is 213222312321299. The next prime is 213222312321427. The reversal of 213222312321320 is 23123213222312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184620374 + ... + 185771706.

It is an arithmetic number, because the mean of its divisors is an integer number (4005303894225).

Almost surely, 2^{213222312321320} is an apocalyptic number.

213222312321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213222312321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256339449230400).

213222312321320 is an abundant number, since it is smaller than the sum of its proper divisors (299456586139480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213222312321320 is a wasteful number, since it uses less digits than its factorization.

213222312321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155067 (or 1155063 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 213222312321320 its reverse (23123213222312), we get a palindrome (236345525543632).

The spelling of 213222312321320 in words is "two hundred thirteen trillion, two hundred twenty-two billion, three hundred twelve million, three hundred twenty-one thousand, three hundred twenty".