201323210220 has 72 divisors (see below), whose sum is σ = 666196811280. Its totient is φ = 48805626240.

The previous prime is 201323210213. The next prime is 201323210251. The reversal of 201323210220 is 22012323102.

201323210220 is a `hidden beast` number, since 201 + 3 + 232 + 10 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201323210193 and 201323210202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50837215 + ... + 50841174.

It is an arithmetic number, because the mean of its divisors is an integer number (9252733490).

Almost surely, 2^201323210220 is an apocalyptic number.

201323210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201323210220 is an abundant number, since it is smaller than the sum of its proper divisors (464873601060).

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

201323210220 is a wasteful number, since it uses less digits than its factorization.

201323210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101678415 (or 101678410 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201323210220 its reverse (22012323102), we get a palindrome (223335533322).

The spelling of 201323210220 in words is "two hundred one billion, three hundred twenty-three million, two hundred ten thousand, two hundred twenty".