3121044013 has 4 divisors (see below), whose sum is σ = 3121418560. Its totient is φ = 3120669468.

The previous prime is 3121044001. The next prime is 3121044023. The reversal of 3121044013 is 3104401213.

3121044013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3121044013 - 2²¹ = 3118946861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121044023) 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, 174483 + ... + 191536.

It is an arithmetic number, because the mean of its divisors is an integer number (780354640).

Almost surely, 2^3121044013 is an apocalyptic number.

It is an amenable number.

3121044013 is a deficient number, since it is larger than the sum of its proper divisors (374547).

3121044013 is an equidigital number, since it uses as much as digits as its factorization.

3121044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374546.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3121044013 is about 55866.3048088917. The cubic root of 3121044013 is about 1461.3916818689.

Adding to 3121044013 its reverse (3104401213), we get a palindrome (6225445226).

The spelling of 3121044013 in words is "three billion, one hundred twenty-one million, forty-four thousand, thirteen".