201421303220 has 24 divisors (see below), whose sum is σ = 437570418600. Its totient is φ = 77790296192.

The previous prime is 201421303219. The next prime is 201421303243. The reversal of 201421303220 is 22303124102.

It can be written as a sum of positive squares in 4 ways, for example, as 87594689296 + 113826613924 = 295964^2 + 337382^2 .

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 = 201421303192 and 201421303201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173638475 + ... + 173639634.

It is an arithmetic number, because the mean of its divisors is an integer number (18232100775).

Almost surely, 2^201421303220 is an apocalyptic number.

201421303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201421303220 is an abundant number, since it is smaller than the sum of its proper divisors (236149115380).

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

201421303220 is a wasteful number, since it uses less digits than its factorization.

201421303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347278147 (or 347278145 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 201421303220 its reverse (22303124102), we get a palindrome (223724427322).

The spelling of 201421303220 in words is "two hundred one billion, four hundred twenty-one million, three hundred three thousand, two hundred twenty".