2021302021 has 4 divisors (see below), whose sum is σ = 2086505344. Its totient is φ = 1956098700.

The previous prime is 2021301937. The next prime is 2021302027. The reversal of 2021302021 is 1202031202.

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-2021302021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021301992 and 2021302010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021302027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32601615 + ... + 32601676.

It is an arithmetic number, because the mean of its divisors is an integer number (521626336).

Almost surely, 2^2021302021 is an apocalyptic number.

It is an amenable number.

2021302021 is a deficient number, since it is larger than the sum of its proper divisors (65203323).

2021302021 is an equidigital number, since it uses as much as digits as its factorization.

2021302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65203322.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2021302021 is about 44958.8925686565. The cubic root of 2021302021 is about 1264.3784061475.

Adding to 2021302021 its reverse (1202031202), we get a palindrome (3223333223).

The spelling of 2021302021 in words is "two billion, twenty-one million, three hundred two thousand, twenty-one".