919091000101 has 4 divisors (see below), whose sum is σ = 941507853804. Its totient is φ = 896674146400.

The previous prime is 919091000083. The next prime is 919091000173. The reversal of 919091000101 is 101000190919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101000190919 = 821 ⋅123020939.

It can be written as a sum of positive squares in 2 ways, for example, as 429267384225 + 489823615876 = 655185^2 + 699874^2 .

It is a cyclic number.

It is not a de Polignac number, because 919091000101 - 2¹⁷ = 919090869029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919091009101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11208426790 + ... + 11208426871.

It is an arithmetic number, because the mean of its divisors is an integer number (235376963451).

Almost surely, 2^919091000101 is an apocalyptic number.

It is an amenable number.

919091000101 is a deficient number, since it is larger than the sum of its proper divisors (22416853703).

919091000101 is a wasteful number, since it uses less digits than its factorization.

919091000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22416853702.

The product of its (nonzero) digits is 729, while the sum is 31.

The spelling of 919091000101 in words is "nine hundred nineteen billion, ninety-one million, one hundred one", and thus it is an aban number.