201201120021220 has 96 divisors (see below), whose sum is σ = 462630575070720. Its totient is φ = 72894889666560.

The previous prime is 201201120021217. The next prime is 201201120021227. The reversal of 201201120021220 is 22120021102102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201201120021194 and 201201120021203.

It is not an unprimeable number, because it can be changed into a prime (201201120021227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141350016 + ... + 142766344.

It is an arithmetic number, because the mean of its divisors is an integer number (4819068490320).

Almost surely, 2^{201201120021220} is an apocalyptic number.

201201120021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201201120021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231315287535360).

201201120021220 is an abundant number, since it is smaller than the sum of its proper divisors (261429455049500).

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

201201120021220 is a wasteful number, since it uses less digits than its factorization.

201201120021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418725 (or 1418723 counting only the distinct ones).

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

Adding to 201201120021220 its reverse (22120021102102), we get a palindrome (223321141123322).

The spelling of 201201120021220 in words is "two hundred one trillion, two hundred one billion, one hundred twenty million, twenty-one thousand, two hundred twenty".