323203121220 has 48 divisors (see below), whose sum is σ = 1034249989248. Its totient is φ = 73874999040.

The previous prime is 323203121161. The next prime is 323203121231. The reversal of 323203121220 is 22121302323.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384765201 + ... + 384766040.

It is an arithmetic number, because the mean of its divisors is an integer number (21546874776).

Almost surely, 2^323203121220 is an apocalyptic number.

323203121220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

323203121220 is an abundant number, since it is smaller than the sum of its proper divisors (711046868028).

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

323203121220 is a wasteful number, since it uses less digits than its factorization.

323203121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769531260 (or 769531258 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 323203121220 its reverse (22121302323), we get a palindrome (345324423543).

The spelling of 323203121220 in words is "three hundred twenty-three billion, two hundred three million, one hundred twenty-one thousand, two hundred twenty".