990111001001001 has 16 divisors (see below), whose sum is σ = 1442340217691328. Its totient is φ = 599159455963200.

The previous prime is 990111001000951. The next prime is 990111001001011. The reversal of 990111001001001 is 100100100111099.

It is not a de Polignac number, because 990111001001001 - 2³⁵ = 990076641262633 is a prime.

990111001001001 is a modest number, since divided by 1001001 gives 990111 as remainder.

It is not an unprimeable number, because it can be changed into a prime (990111001001011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22695412126 + ... + 22695455751.

It is an arithmetic number, because the mean of its divisors is an integer number (90146263605708).

Almost surely, 2^{990111001001001} is an apocalyptic number.

It is an amenable number.

990111001001001 is a deficient number, since it is larger than the sum of its proper divisors (452229216690327).

990111001001001 is a wasteful number, since it uses less digits than its factorization.

990111001001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45390868552.

The product of its (nonzero) digits is 81, while the sum is 24.

The spelling of 990111001001001 in words is "nine hundred ninety trillion, one hundred eleven billion, one million, one thousand, one".