10111111001001 has 24 divisors (see below), whose sum is σ = 15464319702624. Its totient is φ = 6344116732800.

The previous prime is 10111111000993. The next prime is 10111111001077. The reversal of 10111111001001 is 10010011111101.

It is not a de Polignac number, because 10111111001001 - 2³ = 10111111000993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10111111001401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8799570 + ... + 9882036.

It is an arithmetic number, because the mean of its divisors is an integer number (644346654276).

Almost surely, 2^{10111111001001} is an apocalyptic number.

It is an amenable number.

10111111001001 is a deficient number, since it is larger than the sum of its proper divisors (5353208701623).

10111111001001 is a wasteful number, since it uses less digits than its factorization.

10111111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143541 (or 1143538 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 10111111001001 its reverse (10010011111101), we get a palindrome (20121122112102).

The spelling of 10111111001001 in words is "ten trillion, one hundred eleven billion, one hundred eleven million, one thousand, one".