8212346908821 has 16 divisors (see below), whose sum is σ = 13272479853120. Its totient is φ = 4977179944560.

The previous prime is 8212346908813. The next prime is 8212346908823. The reversal of 8212346908821 is 1288096432128.

8212346908821 is a `hidden beast` number, since 8 + 212 + 346 + 9 + 0 + 8 + 82 + 1 = 666.

It is not a de Polignac number, because 8212346908821 - 2³ = 8212346908813 is a prime.

It is a super-2 number, since 2×8212346908821² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212346908823) 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, 13825499550 + ... + 13825500143.

It is an arithmetic number, because the mean of its divisors is an integer number (829529990820).

Almost surely, 2^{8212346908821} is an apocalyptic number.

It is an amenable number.

8212346908821 is a deficient number, since it is larger than the sum of its proper divisors (5060132944299).

8212346908821 is a wasteful number, since it uses less digits than its factorization.

8212346908821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27650999713 (or 27650999707 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 8212346908821 in words is "eight trillion, two hundred twelve billion, three hundred forty-six million, nine hundred eight thousand, eight hundred twenty-one".