2100202001020 has 24 divisors (see below), whose sum is σ = 4410520146144. Its totient is φ = 840062525376.

The previous prime is 2100202000951. The next prime is 2100202001021. The reversal of 2100202001020 is 201002020012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2100202000988 and 2100202001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100202001021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180064 + ... + 2057383.

It is an arithmetic number, because the mean of its divisors is an integer number (183771672756).

Almost surely, 2^{2100202001020} is an apocalyptic number.

2100202001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100202001020 is an abundant number, since it is smaller than the sum of its proper divisors (2310318145124).

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

2100202001020 is a wasteful number, since it uses less digits than its factorization.

2100202001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284389 (or 2284387 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2100202001020 its reverse (201002020012), we get a palindrome (2301204021032).

The spelling of 2100202001020 in words is "two trillion, one hundred billion, two hundred two million, one thousand, twenty".