2120340105 has 64 divisors (see below), whose sum is σ = 4154008320. Its totient is φ = 1019547648.

The previous prime is 2120340091. The next prime is 2120340109. The reversal of 2120340105 is 5010430212.

It is not a de Polignac number, because 2120340105 - 2⁶ = 2120340041 is a prime.

It is a super-2 number, since 2×2120340105² = 8991684321742822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2120340109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61417 + ... + 89513.

It is an arithmetic number, because the mean of its divisors is an integer number (64906380).

Almost surely, 2^2120340105 is an apocalyptic number.

It is an amenable number.

2120340105 is a deficient number, since it is larger than the sum of its proper divisors (2033668215).

2120340105 is a wasteful number, since it uses less digits than its factorization.

2120340105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28167 (or 28161 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2120340105 is about 46047.1508890615. The cubic root of 2120340105 is about 1284.7003505251.

Adding to 2120340105 its reverse (5010430212), we get a palindrome (7130770317).

It can be divided in two parts, 2120 and 340105, that added together give a square (342225 = 585²).

The spelling of 2120340105 in words is "two billion, one hundred twenty million, three hundred forty thousand, one hundred five".