2100205661036 has 12 divisors (see below), whose sum is σ = 4200411322128. Its totient is φ = 900088140432.

The previous prime is 2100205661003. The next prime is 2100205661039. The reversal of 2100205661036 is 6301665020012.

2100205661036 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2100205660993 and 2100205661011.

It is not an unprimeable number, because it can be changed into a prime (2100205661039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37503672491 + ... + 37503672546.

It is an arithmetic number, because the mean of its divisors is an integer number (350034276844).

Almost surely, 2^{2100205661036} is an apocalyptic number.

It is an amenable number.

2100205661036 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2100205661036 is a wasteful number, since it uses less digits than its factorization.

2100205661036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75007345048 (or 75007345046 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 2100205661036 in words is "two trillion, one hundred billion, two hundred five million, six hundred sixty-one thousand, thirty-six".