2021100002021 has 8 divisors (see below), whose sum is σ = 2140307616384. Its totient is φ = 1901927874240.

The previous prime is 2021100002017. The next prime is 2021100002083. The reversal of 2021100002021 is 1202000011202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021100002021 - 2² = 2021100002017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021100001993 and 2021100002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021100002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8754335 + ... + 8982236.

It is an arithmetic number, because the mean of its divisors is an integer number (267538452048).

Almost surely, 2^{2021100002021} is an apocalyptic number.

It is an amenable number.

2021100002021 is a deficient number, since it is larger than the sum of its proper divisors (119207614363).

2021100002021 is a wasteful number, since it uses less digits than its factorization.

2021100002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17743291.

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

Adding to 2021100002021 its reverse (1202000011202), we get a palindrome (3223100013223).

The spelling of 2021100002021 in words is "two trillion, twenty-one billion, one hundred million, two thousand, twenty-one".