2021111000221 has 8 divisors (see below), whose sum is σ = 2023548655104. Its totient is φ = 2018673705360.

The previous prime is 2021111000179. The next prime is 2021111000231. The reversal of 2021111000221 is 1220001111202.

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 2021111000221 - 2²⁷ = 2020976782493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111000231) 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, 12141076 + ... + 12306418.

It is an arithmetic number, because the mean of its divisors is an integer number (252943581888).

Almost surely, 2^{2021111000221} is an apocalyptic number.

It is an amenable number.

2021111000221 is a deficient number, since it is larger than the sum of its proper divisors (2437654883).

2021111000221 is a wasteful number, since it uses less digits than its factorization.

2021111000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180011.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021111000221 its reverse (1220001111202), we get a palindrome (3241112111423).

The spelling of 2021111000221 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.