2128880782213 has 4 divisors (see below), whose sum is σ = 2129232494988. Its totient is φ = 2128529069440.

The previous prime is 2128880782201. The next prime is 2128880782229. The reversal of 2128880782213 is 3122870888212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 375992165124 + 1752888617089 = 613182^2 + 1323967^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128880782213 - 2²⁹ = 2128343911301 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 (2128880782013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175847308 + ... + 175859413.

It is an arithmetic number, because the mean of its divisors is an integer number (532308123747).

Almost surely, 2^{2128880782213} is an apocalyptic number.

It is an amenable number.

2128880782213 is a deficient number, since it is larger than the sum of its proper divisors (351712775).

2128880782213 is an equidigital number, since it uses as much as digits as its factorization.

2128880782213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351712774.

The product of its (nonzero) digits is 1376256, while the sum is 52.

The spelling of 2128880782213 in words is "two trillion, one hundred twenty-eight billion, eight hundred eighty million, seven hundred eighty-two thousand, two hundred thirteen".