213231201320 has 16 divisors (see below), whose sum is σ = 479770203060. Its totient is φ = 85292480512.

The previous prime is 213231201283. The next prime is 213231201341. The reversal of 213231201320 is 23102132312.

It can be written as a sum of positive squares in 2 ways, for example, as 192199820836 + 21031380484 = 438406^2 + 145022^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 213231201292 and 213231201301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2665389977 + ... + 2665390056.

Almost surely, 2^213231201320 is an apocalyptic number.

213231201320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231201320 is an abundant number, since it is smaller than the sum of its proper divisors (266539001740).

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

213231201320 is a wasteful number, since it uses less digits than its factorization.

213231201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330780044 (or 5330780040 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213231201320 its reverse (23102132312), we get a palindrome (236333333632).

The spelling of 213231201320 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred one thousand, three hundred twenty".