8805939843221 has 16 divisors (see below), whose sum is σ = 9025181034480. Its totient is φ = 8589371665920.

The previous prime is 8805939843193. The next prime is 8805939843241. The reversal of 8805939843221 is 1223489395088.

It can be written as a sum of positive squares in 8 ways, for example, as 937970943121 + 7867968900100 = 968489^2 + 2804990^2 .

It is a cyclic number.

It is not a de Polignac number, because 8805939843221 - 2¹⁴ = 8805939826837 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 (8805939843241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3032561 + ... + 5177673.

It is an arithmetic number, because the mean of its divisors is an integer number (564073814655).

Almost surely, 2^{8805939843221} is an apocalyptic number.

It is an amenable number.

8805939843221 is a deficient number, since it is larger than the sum of its proper divisors (219241191259).

8805939843221 is a wasteful number, since it uses less digits than its factorization.

8805939843221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145736.

The product of its (nonzero) digits is 29859840, while the sum is 62.

The spelling of 8805939843221 in words is "eight trillion, eight hundred five billion, nine hundred thirty-nine million, eight hundred forty-three thousand, two hundred twenty-one".