91312230133321 has 4 divisors (see below), whose sum is σ = 91326384880144. Its totient is φ = 91298075386500.

The previous prime is 91312230133309. The next prime is 91312230133357. The reversal of 91312230133321 is 12333103221319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91312230133321 - 2⁷ = 91312230133193 is a prime.

It is a super-3 number, since 3×91312230133321³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91312230133391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7077363735 + ... + 7077376636.

It is an arithmetic number, because the mean of its divisors is an integer number (22831596220036).

Almost surely, 2^{91312230133321} is an apocalyptic number.

It is an amenable number.

91312230133321 is a deficient number, since it is larger than the sum of its proper divisors (14154746823).

91312230133321 is a wasteful number, since it uses less digits than its factorization.

91312230133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14154746822.

The product of its (nonzero) digits is 17496, while the sum is 34.

The spelling of 91312230133321 in words is "ninety-one trillion, three hundred twelve billion, two hundred thirty million, one hundred thirty-three thousand, three hundred twenty-one".