9491313010221 has 24 divisors (see below), whose sum is σ = 16589858036544. Its totient is φ = 5104571702400.

The previous prime is 9491313010159. The next prime is 9491313010253. The reversal of 9491313010221 is 1220103131949.

It is a happy number.

9491313010221 is a `hidden beast` number, since 9 + 491 + 3 + 130 + 10 + 2 + 21 = 666.

9491313010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9491313010221 - 2⁷ = 9491313010093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9491313010121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4431050755 + ... + 4431052896.

It is an arithmetic number, because the mean of its divisors is an integer number (691244084856).

Almost surely, 2^{9491313010221} is an apocalyptic number.

It is an amenable number.

9491313010221 is a deficient number, since it is larger than the sum of its proper divisors (7098545026323).

9491313010221 is a wasteful number, since it uses less digits than its factorization.

9491313010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8862103681 (or 8862103678 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 9491313010221 in words is "nine trillion, four hundred ninety-one billion, three hundred thirteen million, ten thousand, two hundred twenty-one".