2021211020221 has 32 divisors (see below), whose sum is σ = 2158342630400. Its totient is φ = 1889635184640.

The previous prime is 2021211020203. The next prime is 2021211020243. The reversal of 2021211020221 is 1220201121202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021211020221 - 2¹¹ = 2021211018173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021211020195 and 2021211020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021211020281) 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 31 ways as a sum of consecutive naturals, for example, 83824315 + ... + 83848423.

It is an arithmetic number, because the mean of its divisors is an integer number (67448207200).

Almost surely, 2^{2021211020221} is an apocalyptic number.

It is an amenable number.

2021211020221 is a deficient number, since it is larger than the sum of its proper divisors (137131610179).

2021211020221 is a wasteful number, since it uses less digits than its factorization.

2021211020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24869.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021211020221 its reverse (1220201121202), we get a palindrome (3241412141423).

The spelling of 2021211020221 in words is "two trillion, twenty-one billion, two hundred eleven million, twenty thousand, two hundred twenty-one".