91212222221219 has 64 divisors (see below), whose sum is σ = 111609126720000. Its totient is φ = 73588362624000.

The previous prime is 91212222221191. The next prime is 91212222221249.

91212222221219 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 91212222221219 - 2²⁰ = 91212221172643 is a prime.

It is a super-2 number, since 2×91212222221219² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91212222221249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43964732 + ... + 45992630.

It is an arithmetic number, because the mean of its divisors is an integer number (1743892605000).

Almost surely, 2^{91212222221219} is an apocalyptic number.

91212222221219 is a deficient number, since it is larger than the sum of its proper divisors (20396904498781).

91212222221219 is a wasteful number, since it uses less digits than its factorization.

91212222221219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028180.

The product of its digits is 20736, while the sum is 38.

The spelling of 91212222221219 in words is "ninety-one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred nineteen".