201020403220 has 96 divisors (see below), whose sum is σ = 522172224000. Its totient is φ = 63299833344.

The previous prime is 201020403197. The next prime is 201020403229. The reversal of 201020403220 is 22304020102.

It is a junction number, because it is equal to n+sod(n) for n = 201020403194 and 201020403203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020403229) 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, 84666 + ... + 639694.

It is an arithmetic number, because the mean of its divisors is an integer number (5439294000).

Almost surely, 2^201020403220 is an apocalyptic number.

201020403220 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 201020403220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261086112000).

201020403220 is an abundant number, since it is smaller than the sum of its proper divisors (321151820780).

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

201020403220 is a wasteful number, since it uses less digits than its factorization.

201020403220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555257 (or 555255 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 201020403220 its reverse (22304020102), we get a palindrome (223324423322).

The spelling of 201020403220 in words is "two hundred one billion, twenty million, four hundred three thousand, two hundred twenty".