201223204420 has 96 divisors (see below), whose sum is σ = 485984378880. Its totient is φ = 68555859840.

The previous prime is 201223204393. The next prime is 201223204421. The reversal of 201223204420 is 24402322102.

It is a junction number, because it is equal to n+sod(n) for n = 201223204391 and 201223204400.

It is not an unprimeable number, because it can be changed into a prime (201223204421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57310465 + ... + 57313975.

It is an arithmetic number, because the mean of its divisors is an integer number (5062337280).

Almost surely, 2^201223204420 is an apocalyptic number.

201223204420 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 201223204420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242992189440).

201223204420 is an abundant number, since it is smaller than the sum of its proper divisors (284761174460).

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

201223204420 is a wasteful number, since it uses less digits than its factorization.

201223204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993 (or 5991 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 201223204420 its reverse (24402322102), we get a palindrome (225625526522).

The spelling of 201223204420 in words is "two hundred one billion, two hundred twenty-three million, two hundred four thousand, four hundred twenty".