201111011020020 has 48 divisors (see below), whose sum is σ = 565032710874240. Its totient is φ = 53446566746496.

The previous prime is 201111011020013. The next prime is 201111011020021. The reversal of 201111011020020 is 20020110111102.

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 = 201111011019978 and 201111011020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111011020021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5719863280 + ... + 5719898439.

It is an arithmetic number, because the mean of its divisors is an integer number (11771514809880).

Almost surely, 2^{201111011020020} is an apocalyptic number.

201111011020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111011020020 is an abundant number, since it is smaller than the sum of its proper divisors (363921699854220).

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

201111011020020 is a wasteful number, since it uses less digits than its factorization.

201111011020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439762024 (or 11439762022 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201111011020020 its reverse (20020110111102), we get a palindrome (221131121131122).

The spelling of 201111011020020 in words is "two hundred one trillion, one hundred eleven billion, eleven million, twenty thousand, twenty".