91221010223133 has 64 divisors (see below), whose sum is σ = 143191347167232. Its totient is φ = 50576876440320.

The previous prime is 91221010223117. The next prime is 91221010223143. The reversal of 91221010223133 is 33132201012219.

It is not a de Polignac number, because 91221010223133 - 2⁴ = 91221010223117 is a prime.

It is a super-2 number, since 2×91221010223133² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91221010223133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91221010223113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54409735 + ... + 56061227.

It is an arithmetic number, because the mean of its divisors is an integer number (2237364799488).

Almost surely, 2^{91221010223133} is an apocalyptic number.

It is an amenable number.

91221010223133 is a deficient number, since it is larger than the sum of its proper divisors (51970336944099).

91221010223133 is a wasteful number, since it uses less digits than its factorization.

91221010223133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652034.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 91221010223133 in words is "ninety-one trillion, two hundred twenty-one billion, ten million, two hundred twenty-three thousand, one hundred thirty-three".