12821944245 has 16 divisors (see below), whose sum is σ = 22380121152. Its totient is φ = 6216700160.

The previous prime is 12821944241. The next prime is 12821944259. The reversal of 12821944245 is 54244912821.

It is not a de Polignac number, because 12821944245 - 2² = 12821944241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12821944197 and 12821944206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821944241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38854212 + ... + 38854541.

It is an arithmetic number, because the mean of its divisors is an integer number (1398757572).

Almost surely, 2^12821944245 is an apocalyptic number.

12821944245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12821944245 is a deficient number, since it is larger than the sum of its proper divisors (9558176907).

12821944245 is a wasteful number, since it uses less digits than its factorization.

12821944245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77708772.

The product of its digits is 184320, while the sum is 42.

The spelling of 12821944245 in words is "twelve billion, eight hundred twenty-one million, nine hundred forty-four thousand, two hundred forty-five".