91221100122001 has 8 divisors (see below), whose sum is σ = 91229971954464. Its totient is φ = 91212228723360.

The previous prime is 91221100121929. The next prime is 91221100122011. The reversal of 91221100122001 is 10022100112219.

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 91221100122001 - 2¹³ = 91221100113809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91221100122011) 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 7 ways as a sum of consecutive naturals, for example, 545885781 + ... + 546052861.

It is an arithmetic number, because the mean of its divisors is an integer number (11403746494308).

Almost surely, 2^{91221100122001} is an apocalyptic number.

It is an amenable number.

91221100122001 is a deficient number, since it is larger than the sum of its proper divisors (8871832463).

91221100122001 is a wasteful number, since it uses less digits than its factorization.

91221100122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216911.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 91221100122001 in words is "ninety-one trillion, two hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, one".