991022111000001 has 12 divisors (see below), whose sum is σ = 1431480727556880. Its totient is φ = 660679401948120.

The previous prime is 991022110999969. The next prime is 991022111000111. The reversal of 991022111000001 is 100000111220199.

It is not a de Polignac number, because 991022111000001 - 2⁵ = 991022110999969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (991022111040001) 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 11 ways as a sum of consecutive naturals, for example, 163982535 + ... + 169918556.

It is an arithmetic number, because the mean of its divisors is an integer number (119290060629740).

Almost surely, 2^{991022111000001} is an apocalyptic number.

It is an amenable number.

991022111000001 is a deficient number, since it is larger than the sum of its proper divisors (440458616556879).

991022111000001 is a wasteful number, since it uses less digits than its factorization.

991022111000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334230876 (or 334230873 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 991022111000001 in words is "nine hundred ninety-one trillion, twenty-two billion, one hundred eleven million, one", and thus it is an aban number.