3231148727921 has 8 divisors (see below), whose sum is σ = 3251655024744. Its totient is φ = 3210663456000.

The previous prime is 3231148727887. The next prime is 3231148727929. The reversal of 3231148727921 is 1297278411323.

3231148727921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1569730846321 + 1661417881600 = 1252889^2 + 1288960^2 .

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 3231148727921 - 2³⁸ = 2956270820977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3231148727921.

It is not an unprimeable number, because it can be changed into a prime (3231148727929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947830 + ... + 5562671.

It is an arithmetic number, because the mean of its divisors is an integer number (406456878093).

Almost surely, 2^{3231148727921} is an apocalyptic number.

It is an amenable number.

3231148727921 is a deficient number, since it is larger than the sum of its proper divisors (20506296823).

3231148727921 is a wasteful number, since it uses less digits than its factorization.

3231148727921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10512451.

The product of its digits is 1016064, while the sum is 50.

The spelling of 3231148727921 in words is "three trillion, two hundred thirty-one billion, one hundred forty-eight million, seven hundred twenty-seven thousand, nine hundred twenty-one".