2113330122221 has 4 divisors (see below), whose sum is σ = 2113334086332. Its totient is φ = 2113326158112.

The previous prime is 2113330122193. The next prime is 2113330122227. The reversal of 2113330122221 is 1222210333112.

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 1185951492196 + 927378630025 = 1089014^2 + 963005^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113330122221 - 2⁶ = 2113330122157 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 (2113330122227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029920 + ... + 2299433.

It is an arithmetic number, because the mean of its divisors is an integer number (528333521583).

Almost surely, 2^{2113330122221} is an apocalyptic number.

It is an amenable number.

2113330122221 is a deficient number, since it is larger than the sum of its proper divisors (3964111).

2113330122221 is an equidigital number, since it uses as much as digits as its factorization.

2113330122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964110.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2113330122221 its reverse (1222210333112), we get a palindrome (3335540455333).

The spelling of 2113330122221 in words is "two trillion, one hundred thirteen billion, three hundred thirty million, one hundred twenty-two thousand, two hundred twenty-one".