12884821072 has 10 divisors (see below), whose sum is σ = 24964340858. Its totient is φ = 6442410528.

The previous prime is 12884821031. The next prime is 12884821073. The reversal of 12884821072 is 27012848821.

It can be written as a sum of positive squares in only one way, i.e., 12328993296 + 555827776 = 111036^2 + 23576^2 .

It is a super-2 number, since 2×12884821072² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12884821073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402650643 + ... + 402650674.

Almost surely, 2^12884821072 is an apocalyptic number.

It is an amenable number.

12884821072 is a deficient number, since it is larger than the sum of its proper divisors (12079519786).

12884821072 is an equidigital number, since it uses as much as digits as its factorization.

12884821072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805301325 (or 805301319 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 43.

The spelling of 12884821072 in words is "twelve billion, eight hundred eighty-four million, eight hundred twenty-one thousand, seventy-two".