2100201000020 has 48 divisors (see below), whose sum is σ = 4507922377728. Its totient is φ = 821537978880.

The previous prime is 2100201000019. The next prime is 2100201000071. The reversal of 2100201000020 is 200001020012.

It is a junction number, because it is equal to n+sod(n) for n = 2100200999971 and 2100201000007.

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, 249644 + ... + 2064636.

It is an arithmetic number, because the mean of its divisors is an integer number (93915049536).

Almost surely, 2^{2100201000020} is an apocalyptic number.

2100201000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100201000020 is an abundant number, since it is smaller than the sum of its proper divisors (2407721377708).

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

2100201000020 is a wasteful number, since it uses less digits than its factorization.

2100201000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816280 (or 1816278 counting only the distinct ones).

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

Adding to 2100201000020 its reverse (200001020012), we get a palindrome (2300202020032).

The spelling of 2100201000020 in words is "two trillion, one hundred billion, two hundred one million, twenty", and thus it is an aban number.