2102001200020 has 24 divisors (see below), whose sum is σ = 4416966646344. Its totient is φ = 840273979776.

The previous prime is 2102001200017. The next prime is 2102001200059. The reversal of 2102001200020 is 200021002012.

It can be written as a sum of positive squares in 4 ways, for example, as 95279638276 + 2006721561744 = 308674^2 + 1416588^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32873527 + ... + 32937406.

It is an arithmetic number, because the mean of its divisors is an integer number (184040276931).

Almost surely, 2^{2102001200020} is an apocalyptic number.

2102001200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102001200020 is an abundant number, since it is smaller than the sum of its proper divisors (2314965446324).

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

2102001200020 is a wasteful number, since it uses less digits than its factorization.

2102001200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65812539 (or 65812537 counting only the distinct ones).

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

Adding to 2102001200020 its reverse (200021002012), we get a palindrome (2302022202032).

The spelling of 2102001200020 in words is "two trillion, one hundred two billion, one million, two hundred thousand, twenty".