3121004021 has 8 divisors (see below), whose sum is σ = 3258187200. Its totient is φ = 2983944832.

The previous prime is 3121003999. The next prime is 3121004053. The reversal of 3121004021 is 1204001213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121004021 - 2¹⁴ = 3120987637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121003987 and 3121004005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121004071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22430 + ... + 82128.

It is an arithmetic number, because the mean of its divisors is an integer number (407273400).

Almost surely, 2^3121004021 is an apocalyptic number.

It is an amenable number.

3121004021 is a deficient number, since it is larger than the sum of its proper divisors (137183179).

3121004021 is a wasteful number, since it uses less digits than its factorization.

3121004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61995.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3121004021 is about 55865.9468817991. The cubic root of 3121004021 is about 1461.3854399163.

Adding to 3121004021 its reverse (1204001213), we get a palindrome (4325005234).

The spelling of 3121004021 in words is "three billion, one hundred twenty-one million, four thousand, twenty-one".