2021212101133 has 4 divisors (see below), whose sum is σ = 2021224252828. Its totient is φ = 2021199949440.

The previous prime is 2021212101107. The next prime is 2021212101199. The reversal of 2021212101133 is 3311012121202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1860381425764 + 160830675369 = 1363958^2 + 401037^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021212101133 - 2²⁵ = 2021178546701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021212101133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021212104133) 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, 5822838 + ... + 6160183.

It is an arithmetic number, because the mean of its divisors is an integer number (505306063207).

Almost surely, 2^{2021212101133} is an apocalyptic number.

It is an amenable number.

2021212101133 is a deficient number, since it is larger than the sum of its proper divisors (12151695).

2021212101133 is a wasteful number, since it uses less digits than its factorization.

2021212101133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12151694.

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

Adding to 2021212101133 its reverse (3311012121202), we get a palindrome (5332224222335).

The spelling of 2021212101133 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred one thousand, one hundred thirty-three".