2113122221 has 8 divisors (see below), whose sum is σ = 2542102080. Its totient is φ = 1715918688.

The previous prime is 2113122203. The next prime is 2113122227. The reversal of 2113122221 is 1222213112.

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

It is a cyclic number.

It is not a de Polignac number, because 2113122221 - 2¹⁴ = 2113105837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113122227) 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, 7943936 + ... + 7944201.

It is an arithmetic number, because the mean of its divisors is an integer number (317762760).

Almost surely, 2^2113122221 is an apocalyptic number.

It is an amenable number.

2113122221 is a deficient number, since it is larger than the sum of its proper divisors (428979859).

2113122221 is a wasteful number, since it uses less digits than its factorization.

2113122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15888163.

The product of its digits is 96, while the sum is 17.

The square root of 2113122221 is about 45968.7091508996. The cubic root of 2113122221 is about 1283.2409368609.

Adding to 2113122221 its reverse (1222213112), we get a palindrome (3335335333).

The spelling of 2113122221 in words is "two billion, one hundred thirteen million, one hundred twenty-two thousand, two hundred twenty-one".