91010201019 has 16 divisors (see below), whose sum is σ = 122902617600. Its totient is φ = 59895871776.

The previous prime is 91010200991. The next prime is 91010201027.

91010201019 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 91010201019 - 2⁸ = 91010200763 is a prime.

It is a super-2 number, since 2×91010201019² (a number of 23 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 91010201019.

It is not an unprimeable number, because it can be changed into a prime (91010201099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1648192 + ... + 1702514.

It is an arithmetic number, because the mean of its divisors is an integer number (7681413600).

Almost surely, 2^91010201019 is an apocalyptic number.

91010201019 is a deficient number, since it is larger than the sum of its proper divisors (31892416581).

91010201019 is a wasteful number, since it uses less digits than its factorization.

91010201019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61474.

The product of its (nonzero) digits is 162, while the sum is 24.

The spelling of 91010201019 in words is "ninety-one billion, ten million, two hundred one thousand, nineteen".