2113330021021 has 4 divisors (see below), whose sum is σ = 2114694341500. Its totient is φ = 2111965700544.

The previous prime is 2113330021009. The next prime is 2113330021037. The reversal of 2113330021021 is 1201200333112.

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 626613144921 + 1486716876100 = 791589^2 + 1219310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113330021021 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 2113330021021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113330021091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682157916 + ... + 682161013.

It is an arithmetic number, because the mean of its divisors is an integer number (528673585375).

Almost surely, 2^{2113330021021} is an apocalyptic number.

It is an amenable number.

2113330021021 is a deficient number, since it is larger than the sum of its proper divisors (1364320479).

2113330021021 is a wasteful number, since it uses less digits than its factorization.

2113330021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364320478.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2113330021021 its reverse (1201200333112), we get a palindrome (3314530354133).

The spelling of 2113330021021 in words is "two trillion, one hundred thirteen billion, three hundred thirty million, twenty-one thousand, twenty-one".