9812113230221 has 8 divisors (see below), whose sum is σ = 9853006635384. Its totient is φ = 9771221306880.

The previous prime is 9812113230217. The next prime is 9812113230331. The reversal of 9812113230221 is 1220323112189.

It can be written as a sum of positive squares in 4 ways, for example, as 4172271952996 + 5639841277225 = 2042614^2 + 2374835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9812113230221 - 2² = 9812113230217 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 (9812113236221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14070641 + ... + 14751513.

It is an arithmetic number, because the mean of its divisors is an integer number (1231625829423).

Almost surely, 2^{9812113230221} is an apocalyptic number.

It is an amenable number.

9812113230221 is a deficient number, since it is larger than the sum of its proper divisors (40893405163).

9812113230221 is a wasteful number, since it uses less digits than its factorization.

9812113230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740911.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 9812113230221 in words is "nine trillion, eight hundred twelve billion, one hundred thirteen million, two hundred thirty thousand, two hundred twenty-one".