2021200020101 has 4 divisors (see below), whose sum is σ = 2026707377472. Its totient is φ = 2015692662732.

The previous prime is 2021200020083. The next prime is 2021200020139. The reversal of 2021200020101 is 1010200021202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021200020101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021200020001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2753678135 + ... + 2753678868.

It is an arithmetic number, because the mean of its divisors is an integer number (506676844368).

Almost surely, 2^{2021200020101} is an apocalyptic number.

It is an amenable number.

2021200020101 is a deficient number, since it is larger than the sum of its proper divisors (5507357371).

2021200020101 is an equidigital number, since it uses as much as digits as its factorization.

2021200020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507357370.

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

Adding to 2021200020101 its reverse (1010200021202), we get a palindrome (3031400041303).

The spelling of 2021200020101 in words is "two trillion, twenty-one billion, two hundred million, twenty thousand, one hundred one".