2121330113 has 4 divisors (see below), whose sum is σ = 2424377280. Its totient is φ = 1818282948.

The previous prime is 2121330109. The next prime is 2121330121. The reversal of 2121330113 is 3110331212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121330113 - 2² = 2121330109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121330091 and 2121330100.

It is not an unprimeable number, because it can be changed into a prime (2121330163) 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, 151523573 + ... + 151523586.

It is an arithmetic number, because the mean of its divisors is an integer number (606094320).

Almost surely, 2^2121330113 is an apocalyptic number.

It is an amenable number.

2121330113 is a deficient number, since it is larger than the sum of its proper divisors (303047167).

2121330113 is an equidigital number, since it uses as much as digits as its factorization.

2121330113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303047166.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2121330113 is about 46057.8995721689. The cubic root of 2121330113 is about 1284.9002658947.

Adding to 2121330113 its reverse (3110331212), we get a palindrome (5231661325).

The spelling of 2121330113 in words is "two billion, one hundred twenty-one million, three hundred thirty thousand, one hundred thirteen".