9131222213091 has 96 divisors (see below), whose sum is σ = 15317507352576. Its totient is φ = 5189173632000.

The previous prime is 9131222213077. The next prime is 9131222213093. The reversal of 9131222213091 is 1903122221319.

9131222213091 is a `hidden beast` number, since 9 + 1 + 3 + 122 + 221 + 309 + 1 = 666.

It is not a de Polignac number, because 9131222213091 - 2²¹ = 9131220115939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9131222213093) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27199440 + ... + 27533106.

It is an arithmetic number, because the mean of its divisors is an integer number (159557368256).

Almost surely, 2^{9131222213091} is an apocalyptic number.

9131222213091 is a deficient number, since it is larger than the sum of its proper divisors (6186285139485).

9131222213091 is a wasteful number, since it uses less digits than its factorization.

9131222213091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333993 (or 333990 counting only the distinct ones).

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

It can be divided in two parts, 913122 and 2213091, that added together give a palindrome (3126213).

The spelling of 9131222213091 in words is "nine trillion, one hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, ninety-one".