2101201200020 has 48 divisors (see below), whose sum is σ = 4752321087360. Its totient is φ = 775767113856.

The previous prime is 2101201199987. The next prime is 2101201200061. The reversal of 2101201200020 is 200021021012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2101201199974 and 2101201200010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063209 + ... + 3685871.

It is an arithmetic number, because the mean of its divisors is an integer number (99006689320).

Almost surely, 2^{2101201200020} is an apocalyptic number.

2101201200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101201200020 is an abundant number, since it is smaller than the sum of its proper divisors (2651119887340).

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

2101201200020 is a wasteful number, since it uses less digits than its factorization.

2101201200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635664 (or 635662 counting only the distinct ones).

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

Adding to 2101201200020 its reverse (200021021012), we get a palindrome (2301222221032).

The spelling of 2101201200020 in words is "two trillion, one hundred one billion, two hundred one million, two hundred thousand, twenty".