990100111001 has 4 divisors (see below), whose sum is σ = 990225877812. Its totient is φ = 989974344192.

The previous prime is 990100110997. The next prime is 990100111003. The reversal of 990100111001 is 100111001099.

It is a happy number.

990100111001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 50317219225 + 939782891776 = 224315^2 + 969424^2 .

It is a cyclic number.

It is not a de Polignac number, because 990100111001 - 2² = 990100110997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990100111003) 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, 62871596 + ... + 62887341.

It is an arithmetic number, because the mean of its divisors is an integer number (247556469453).

Almost surely, 2^990100111001 is an apocalyptic number.

It is an amenable number.

990100111001 is a deficient number, since it is larger than the sum of its proper divisors (125766811).

990100111001 is a wasteful number, since it uses less digits than its factorization.

990100111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125766810.

The product of its (nonzero) digits is 81, while the sum is 23.

The spelling of 990100111001 in words is "nine hundred ninety billion, one hundred million, one hundred eleven thousand, one".