12884045921 has 2 divisors, whose sum is σ = 12884045922. Its totient is φ = 12884045920.

The previous prime is 12884045903. The next prime is 12884045989. The reversal of 12884045921 is 12954048821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6526216225 + 6357829696 = 80785^2 + 79736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12884045921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12884045621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6442022960 + 6442022961.

It is an arithmetic number, because the mean of its divisors is an integer number (6442022961).

Almost surely, 2^12884045921 is an apocalyptic number.

It is an amenable number.

12884045921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12884045921 is an equidigital number, since it uses as much as digits as its factorization.

12884045921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 12884045921 in words is "twelve billion, eight hundred eighty-four million, forty-five thousand, nine hundred twenty-one".