3128232571021 has 16 divisors (see below), whose sum is σ = 3206854022400. Its totient is φ = 3050342875008.

The previous prime is 3128232571003. The next prime is 3128232571043. The reversal of 3128232571021 is 1201752328213.

It is a cyclic number.

It is not a de Polignac number, because 3128232571021 - 2⁵ = 3128232570989 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 (3128232574021) 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 15 ways as a sum of consecutive naturals, for example, 63339625 + ... + 63388993.

It is an arithmetic number, because the mean of its divisors is an integer number (200428376400).

Almost surely, 2^{3128232571021} is an apocalyptic number.

It is an amenable number.

3128232571021 is a deficient number, since it is larger than the sum of its proper divisors (78621451379).

3128232571021 is a wasteful number, since it uses less digits than its factorization.

3128232571021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56748.

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 3128232571021 its reverse (1201752328213), we get a palindrome (4329984899234).

The spelling of 3128232571021 in words is "three trillion, one hundred twenty-eight billion, two hundred thirty-two million, five hundred seventy-one thousand, twenty-one".