3128130136421 has 16 divisors (see below), whose sum is σ = 3169936788480. Its totient is φ = 3086522718720.

The previous prime is 3128130136387. The next prime is 3128130136487. The reversal of 3128130136421 is 1246310318213.

3128130136421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128130136421 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 (3128130136721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199911020 + ... + 199926666.

It is an arithmetic number, because the mean of its divisors is an integer number (198121049280).

Almost surely, 2^{3128130136421} is an apocalyptic number.

It is an amenable number.

3128130136421 is a deficient number, since it is larger than the sum of its proper divisors (41806652059).

3128130136421 is a wasteful number, since it uses less digits than its factorization.

3128130136421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21844.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 3128130136421 in words is "three trillion, one hundred twenty-eight billion, one hundred thirty million, one hundred thirty-six thousand, four hundred twenty-one".