2021100202021 has 8 divisors (see below), whose sum is σ = 2109071208384. Its totient is φ = 1933137286080.

The previous prime is 2021100202007. The next prime is 2021100202031. The reversal of 2021100202021 is 1202020011202.

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 2021100202021 - 2¹⁹ = 2021099677733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021100201992 and 2021100202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021100202031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509331 + ... + 2514016.

It is an arithmetic number, because the mean of its divisors is an integer number (263633901048).

Almost surely, 2^{2021100202021} is an apocalyptic number.

It is an amenable number.

2021100202021 is a deficient number, since it is larger than the sum of its proper divisors (87971006363).

2021100202021 is a wasteful number, since it uses less digits than its factorization.

2021100202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045211.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021100202021 its reverse (1202020011202), we get a palindrome (3223120213223).

The spelling of 2021100202021 in words is "two trillion, twenty-one billion, one hundred million, two hundred two thousand, twenty-one".