3121010113 has 4 divisors (see below), whose sum is σ = 3361087828. Its totient is φ = 2880932400.

The previous prime is 3121010041. The next prime is 3121010117. The reversal of 3121010113 is 3110101213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3110101213 = 7589 ⋅409817.

It can be written as a sum of positive squares in 2 ways, for example, as 1447954704 + 1673055409 = 38052^2 + 40903^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121010113 - 2⁹ = 3121009601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 240077701 = 3121010113 / (3 + 1 + 2 + 1 + 0 + 1 + 0 + 1 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121010093 and 3121010102.

It is not an unprimeable number, because it can be changed into a prime (3121010117) 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, 120038838 + ... + 120038863.

It is an arithmetic number, because the mean of its divisors is an integer number (840271957).

Almost surely, 2^3121010113 is an apocalyptic number.

It is an amenable number.

3121010113 is a deficient number, since it is larger than the sum of its proper divisors (240077715).

3121010113 is a wasteful number, since it uses less digits than its factorization.

3121010113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240077714.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 3121010113 is about 55866.0014051480. The cubic root of 3121010113 is about 1461.3863907593.

Adding to 3121010113 its reverse (3110101213), we get a palindrome (6231111326).

The spelling of 3121010113 in words is "three billion, one hundred twenty-one million, ten thousand, one hundred thirteen".