201021200220 has 24 divisors (see below), whose sum is σ = 562859360784. Its totient is φ = 53605653376.

The previous prime is 201021200153. The next prime is 201021200227. The reversal of 201021200220 is 22002120102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201021200196 and 201021200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021200227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675176609 + ... + 1675176728.

It is an arithmetic number, because the mean of its divisors is an integer number (23452473366).

Almost surely, 2^201021200220 is an apocalyptic number.

201021200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021200220 is an abundant number, since it is smaller than the sum of its proper divisors (361838160564).

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

201021200220 is a wasteful number, since it uses less digits than its factorization.

201021200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350353349 (or 3350353347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201021200220 its reverse (22002120102), we get a palindrome (223023320322).

The spelling of 201021200220 in words is "two hundred one billion, twenty-one million, two hundred thousand, two hundred twenty".