201331323220 has 24 divisors (see below), whose sum is σ = 422807868000. Its totient is φ = 80530226592.

The previous prime is 201331323217. The next prime is 201331323229. The reversal of 201331323220 is 22323133102.

It is a super-2 number, since 2×201331323220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201331323191 and 201331323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201331323229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691231 + ... + 938329.

It is an arithmetic number, because the mean of its divisors is an integer number (17616994500).

Almost surely, 2^201331323220 is an apocalyptic number.

201331323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201331323220 is an abundant number, since it is smaller than the sum of its proper divisors (221476544780).

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

201331323220 is a wasteful number, since it uses less digits than its factorization.

201331323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287847 (or 287845 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 201331323220 its reverse (22323133102), we get a palindrome (223654456322).

The spelling of 201331323220 in words is "two hundred one billion, three hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty".