20210120200001 has 4 divisors (see below), whose sum is σ = 20395534146900. Its totient is φ = 20024706253104.

The previous prime is 20210120199977. The next prime is 20210120200013. The reversal of 20210120200001 is 10000202101202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18128852324401 + 2081267875600 = 4257799^2 + 1442660^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210120200001 - 2³⁰ = 20209046458177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210120200031) 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, 92706973286 + ... + 92706973503.

It is an arithmetic number, because the mean of its divisors is an integer number (5098883536725).

Almost surely, 2^{20210120200001} is an apocalyptic number.

It is an amenable number.

20210120200001 is a deficient number, since it is larger than the sum of its proper divisors (185413946899).

20210120200001 is a wasteful number, since it uses less digits than its factorization.

20210120200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185413946898.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20210120200001 its reverse (10000202101202), we get a palindrome (30210322301203).

The spelling of 20210120200001 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, two hundred thousand, one".