2021113301221 has 6 divisors (see below), whose sum is σ = 2351090983110. Its totient is φ = 1732382829576.

The previous prime is 2021113301197. The next prime is 2021113301227. The reversal of 2021113301221 is 1221033111202.

It can be written as a sum of positive squares in only one way, i.e., 1799850312225 + 221262988996 = 1341585^2 + 470386^2 .

It is not a de Polignac number, because 2021113301221 - 2⁹ = 2021113300709 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 (2021113301227) 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 5 ways as a sum of consecutive naturals, for example, 20623605066 + ... + 20623605163.

It is an arithmetic number, because the mean of its divisors is an integer number (391848497185).

Almost surely, 2^{2021113301221} is an apocalyptic number.

It is an amenable number.

2021113301221 is a deficient number, since it is larger than the sum of its proper divisors (329977681889).

2021113301221 is an equidigital number, since it uses as much as digits as its factorization.

2021113301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41247210243 (or 41247210236 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2021113301221 its reverse (1221033111202), we get a palindrome (3242146412423).

The spelling of 2021113301221 in words is "two trillion, twenty-one billion, one hundred thirteen million, three hundred one thousand, two hundred twenty-one".