990111110000101 has 4 divisors (see below), whose sum is σ = 995834295607212. Its totient is φ = 984387924392992.

The previous prime is 990111110000081. The next prime is 990111110000123. The reversal of 990111110000101 is 101000011111099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 767922244188100 + 222188865812001 = 27711410^2 + 14906001^2 .

It is a cyclic number.

It is not a de Polignac number, because 990111110000101 - 2¹⁵ = 990111109967333 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 (990111110000191) 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, 2861592803296 + ... + 2861592803641.

It is an arithmetic number, because the mean of its divisors is an integer number (248958573901803).

Almost surely, 2^{990111110000101} is an apocalyptic number.

It is an amenable number.

990111110000101 is a deficient number, since it is larger than the sum of its proper divisors (5723185607111).

990111110000101 is a wasteful number, since it uses less digits than its factorization.

990111110000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723185607110.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 990111110000101 in words is "nine hundred ninety trillion, one hundred eleven billion, one hundred ten million, one hundred one", and thus it is an aban number.