201201221201020 has 192 divisors, whose sum is σ = 434534554202112. Its totient is φ = 78236928000000.

The previous prime is 201201221201011. The next prime is 201201221201023. The reversal of 201201221201020 is 20102122102102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201201221200985 and 201201221201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201221201023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20321298070 + ... + 20321307970.

It is an arithmetic number, because the mean of its divisors is an integer number (2263200803136).

Almost surely, 2^{201201221201020} is an apocalyptic number.

201201221201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201201221201020 is an abundant number, since it is smaller than the sum of its proper divisors (233333333001092).

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

201201221201020 is a wasteful number, since it uses less digits than its factorization.

201201221201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952 (or 10950 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201201221201020 its reverse (20102122102102), we get a palindrome (221303343303122).

The spelling of 201201221201020 in words is "two hundred one trillion, two hundred one billion, two hundred twenty-one million, two hundred one thousand, twenty".