2100200110020 has 60 divisors (see below), whose sum is σ = 6588405535404. Its totient is φ = 560053362240.

The previous prime is 2100200110013. The next prime is 2100200110027. The reversal of 2100200110020 is 200110020012.

It is an interprime number because it is at equal distance from previous prime (2100200110013) and next prime (2100200110027).

It can be written as a sum of positive squares in 2 ways, for example, as 1074095940996 + 1026104169024 = 1036386^2 + 1012968^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2100200109984 and 2100200110011.

It is not an unprimeable number, because it can be changed into a prime (2100200110027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 648208291 + ... + 648211530.

Almost surely, 2^{2100200110020} is an apocalyptic number.

2100200110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100200110020 is an abundant number, since it is smaller than the sum of its proper divisors (4488205425384).

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

2100200110020 is a wasteful number, since it uses less digits than its factorization.

2100200110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296419842 (or 1296419831 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100200110020 its reverse (200110020012), we get a palindrome (2300310130032).

The spelling of 2100200110020 in words is "two trillion, one hundred billion, two hundred million, one hundred ten thousand, twenty".