2120305331 has 4 divisors (see below), whose sum is σ = 2245029192. Its totient is φ = 1995581472.

The previous prime is 2120305321. The next prime is 2120305339. The reversal of 2120305331 is 1335030212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120305331 is a prime.

It is a super-2 number, since 2×2120305331² = 8991389393334039122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120305339) 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, 62361905 + ... + 62361938.

It is an arithmetic number, because the mean of its divisors is an integer number (561257298).

Almost surely, 2^2120305331 is an apocalyptic number.

2120305331 is a deficient number, since it is larger than the sum of its proper divisors (124723861).

2120305331 is a wasteful number, since it uses less digits than its factorization.

2120305331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124723860.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 2120305331 is about 46046.7732962908. The cubic root of 2120305331 is about 1284.6933273728.

Adding to 2120305331 its reverse (1335030212), we get a palindrome (3455335543).

The spelling of 2120305331 in words is "two billion, one hundred twenty million, three hundred five thousand, three hundred thirty-one".