201101202020 has 48 divisors (see below), whose sum is σ = 434373139200. Its totient is φ = 78162610176.

The previous prime is 201101202017. The next prime is 201101202031. The reversal of 201101202020 is 20202101102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201101201992 and 201101202010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439820 + ... + 771779.

It is an arithmetic number, because the mean of its divisors is an integer number (9049440400).

Almost surely, 2^201101202020 is an apocalyptic number.

201101202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101202020 is an abundant number, since it is smaller than the sum of its proper divisors (233271937180).

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

201101202020 is a wasteful number, since it uses less digits than its factorization.

201101202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211844 (or 1211842 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201101202020 its reverse (20202101102), we get a palindrome (221303303122).

The spelling of 201101202020 in words is "two hundred one billion, one hundred one million, two hundred two thousand, twenty".