91112001121061 has 2 divisors, whose sum is σ = 91112001121062. Its totient is φ = 91112001121060.

The previous prime is 91112001120953. The next prime is 91112001121081. The reversal of 91112001121061 is 16012110021119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80374255198561 + 10737745922500 = 8965169^2 + 3276850^2 .

It is a cyclic number.

It is not a de Polignac number, because 91112001121061 - 2⁴² = 86713954609957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91112001121061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91112001121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45556000560530 + 45556000560531.

It is an arithmetic number, because the mean of its divisors is an integer number (45556000560531).

Almost surely, 2^{91112001121061} is an apocalyptic number.

It is an amenable number.

91112001121061 is a deficient number, since it is larger than the sum of its proper divisors (1).

91112001121061 is an equidigital number, since it uses as much as digits as its factorization.

91112001121061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 26.

The spelling of 91112001121061 in words is "ninety-one trillion, one hundred twelve billion, one million, one hundred twenty-one thousand, sixty-one".