201201200020 has 24 divisors (see below), whose sum is σ = 422544372264. Its totient is φ = 80476317696.

The previous prime is 201201199993. The next prime is 201201200047. The reversal of 201201200020 is 20002102102.

201201200020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201201199993) and next prime (201201200047).

It can be written as a sum of positive squares in 4 ways, for example, as 2595494916 + 198605705104 = 50946^2 + 445652^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152172 + ... + 652348.

It is an arithmetic number, because the mean of its divisors is an integer number (17606015511).

Almost surely, 2^201201200020 is an apocalyptic number.

201201200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201201200020 is an abundant number, since it is smaller than the sum of its proper divisors (221343172244).

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

201201200020 is a wasteful number, since it uses less digits than its factorization.

201201200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520299 (or 520297 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201201200020 its reverse (20002102102), we get a palindrome (221203302122).

The spelling of 201201200020 in words is "two hundred one billion, two hundred one million, two hundred thousand, twenty".