201021202112220 has 192 divisors, whose sum is σ = 714751112678400. Its totient is φ = 45947120866560.

The previous prime is 201021202112141. The next prime is 201021202112261. The reversal of 201021202112220 is 22211202120102.

It is a happy number.

201021202112220 is a `hidden beast` number, since 20 + 1 + 0 + 212 + 0 + 211 + 2 + 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 = 201021202112193 and 201021202112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 344554155 + ... + 345137085.

It is an arithmetic number, because the mean of its divisors is an integer number (3722662045200).

Almost surely, 2^{201021202112220} is an apocalyptic number.

201021202112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021202112220 is an abundant number, since it is smaller than the sum of its proper divisors (513729910566180).

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

201021202112220 is a wasteful number, since it uses less digits than its factorization.

201021202112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674185 (or 674177 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201021202112220 its reverse (22211202120102), we get a palindrome (223232404232322).

The spelling of 201021202112220 in words is "two hundred one trillion, twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred twenty".