2021202233021 has 4 divisors (see below), whose sum is σ = 2021205442044. Its totient is φ = 2021199024000.

The previous prime is 2021202232993. The next prime is 2021202233173. The reversal of 2021202233021 is 1203322021202.

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 458889727396 + 1562312505625 = 677414^2 + 1249925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021202233021 - 2⁶ = 2021202232957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021202232984 and 2021202233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021202233321) 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, 313460 + ... + 2034861.

It is an arithmetic number, because the mean of its divisors is an integer number (505301360511).

Almost surely, 2^{2021202233021} is an apocalyptic number.

It is an amenable number.

2021202233021 is a deficient number, since it is larger than the sum of its proper divisors (3209023).

2021202233021 is an equidigital number, since it uses as much as digits as its factorization.

2021202233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209022.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 2021202233021 its reverse (1203322021202), we get a palindrome (3224524254223).

The spelling of 2021202233021 in words is "two trillion, twenty-one billion, two hundred two million, two hundred thirty-three thousand, twenty-one".