2021122000221 has 4 divisors (see below), whose sum is σ = 2694829333632. Its totient is φ = 1347414666812.

The previous prime is 2021122000211. The next prime is 2021122000237. The reversal of 2021122000221 is 1220002211202.

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 not a de Polignac number, because 2021122000221 - 2⁵ = 2021122000189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021122000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122000211) 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, 336853666701 + ... + 336853666706.

It is an arithmetic number, because the mean of its divisors is an integer number (673707333408).

Almost surely, 2^{2021122000221} is an apocalyptic number.

It is an amenable number.

2021122000221 is a deficient number, since it is larger than the sum of its proper divisors (673707333411).

2021122000221 is an equidigital number, since it uses as much as digits as its factorization.

2021122000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673707333410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021122000221 its reverse (1220002211202), we get a palindrome (3241124211423).

The spelling of 2021122000221 in words is "two trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.