2128392127801 has 9 divisors (see below), whose sum is σ = 2135713116709. Its totient is φ = 2121096163900.

The previous prime is 2128392127789. The next prime is 2128392127811. The reversal of 2128392127801 is 1087212938212.

The square root of 2128392127801 is 1458901.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2128392127801 - 2²¹ = 2128390030649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128392127811) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 453715866 + ... + 453720556.

Almost surely, 2^{2128392127801} is an apocalyptic number.

2128392127801 is the 1458901-st square number.

2128392127801 is the 729451-st centered octagonal number.

It is an amenable number.

2128392127801 is a deficient number, since it is larger than the sum of its proper divisors (7320988908).

2128392127801 is an frugal number, since it uses more digits than its factorization.

2128392127801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10004 (or 5002 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 2128392127801 in words is "two trillion, one hundred twenty-eight billion, three hundred ninety-two million, one hundred twenty-seven thousand, eight hundred one".