91001111012122 has 16 divisors (see below), whose sum is σ = 138797914338144. Its totient is φ = 44735768766000.

The previous prime is 91001111012033. The next prime is 91001111012129. The reversal of 91001111012122 is 22121011110019.

It is a happy number.

It is a super-3 number, since 3×91001111012122³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91001111012093 and 91001111012102.

It is not an unprimeable number, because it can be changed into a prime (91001111012129) 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, 157009504 + ... + 157588027.

It is an arithmetic number, because the mean of its divisors is an integer number (8674869646134).

Almost surely, 2^{91001111012122} is an apocalyptic number.

91001111012122 is a deficient number, since it is larger than the sum of its proper divisors (47796803326022).

91001111012122 is a wasteful number, since it uses less digits than its factorization.

91001111012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314599965.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 91001111012122 in words is "ninety-one trillion, one billion, one hundred eleven million, twelve thousand, one hundred twenty-two".