2021021111201 has 8 divisors (see below), whose sum is σ = 2041935909000. Its totient is φ = 2000159465472.

The previous prime is 2021021111189. The next prime is 2021021111339. The reversal of 2021021111201 is 1021111201202.

It can be written as a sum of positive squares in 4 ways, for example, as 116469308176 + 1904551803025 = 341276^2 + 1380055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021021111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021021111101) 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, 13211576 + ... + 13363673.

It is an arithmetic number, because the mean of its divisors is an integer number (255241988625).

Almost surely, 2^{2021021111201} is an apocalyptic number.

It is an amenable number.

2021021111201 is a deficient number, since it is larger than the sum of its proper divisors (20914797799).

2021021111201 is a wasteful number, since it uses less digits than its factorization.

2021021111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26576035.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021021111201 its reverse (1021111201202), we get a palindrome (3042132312403).

Subtracting from 2021021111201 its reverse (1021111201202), we obtain a palindrome (999909909999).

It can be divided in two parts, 202 and 1021111201, that multiplied together give a palindrome (206264462602).

The spelling of 2021021111201 in words is "two trillion, twenty-one billion, twenty-one million, one hundred eleven thousand, two hundred one".