82128312130 has 8 divisors (see below), whose sum is σ = 147830961852. Its totient is φ = 32851324848.

The previous prime is 82128312109. The next prime is 82128312131. The reversal of 82128312130 is 3121382128.

It can be written as a sum of positive squares in 2 ways, for example, as 71416683121 + 10711629009 = 267239^2 + 103497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 82128312092 and 82128312101.

It is not an unprimeable number, because it can be changed into a prime (82128312131) 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 3 ways as a sum of consecutive naturals, for example, 4106415597 + ... + 4106415616.

Almost surely, 2^82128312130 is an apocalyptic number.

82128312130 is a deficient number, since it is larger than the sum of its proper divisors (65702649722).

82128312130 is a wasteful number, since it uses less digits than its factorization.

82128312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212831220.

The product of its (nonzero) digits is 4608, while the sum is 31.

Adding to 82128312130 its reverse (3121382128), we get a palindrome (85249694258).

The spelling of 82128312130 in words is "eighty-two billion, one hundred twenty-eight million, three hundred twelve thousand, one hundred thirty".