3121240113 has 12 divisors (see below), whose sum is σ = 4518504900. Its totient is φ = 2076189696.

The previous prime is 3121240081. The next prime is 3121240127. The reversal of 3121240113 is 3110421213.

3121240113 is a `hidden beast` number, since 312 + 1 + 240 + 113 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1988446464 + 1132793649 = 44592^2 + 33657^2 .

It is not a de Polignac number, because 3121240113 - 2⁵ = 3121240081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3121240163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382156 + ... + 390237.

It is an arithmetic number, because the mean of its divisors is an integer number (376542075).

Almost surely, 2^3121240113 is an apocalyptic number.

It is an amenable number.

3121240113 is a deficient number, since it is larger than the sum of its proper divisors (1397264787).

3121240113 is a wasteful number, since it uses less digits than its factorization.

3121240113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772848 (or 772845 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3121240113 is about 55868.0598642910. The cubic root of 3121240113 is about 1461.4222883909.

Adding to 3121240113 its reverse (3110421213), we get a palindrome (6231661326).

The spelling of 3121240113 in words is "three billion, one hundred twenty-one million, two hundred forty thousand, one hundred thirteen".