111010110001001 has 4 divisors (see below), whose sum is σ = 113717673659604. Its totient is φ = 108302546342400.

The previous prime is 111010110000991. The next prime is 111010110001019. The reversal of 111010110001001 is 100100011010111.

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 45006655690000 + 66003454311001 = 6708700^2 + 8124251^2 .

It is a cyclic number.

It is not a de Polignac number, because 111010110001001 - 2³⁴ = 110992930131817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111010110001001.

It is not an unprimeable number, because it can be changed into a prime (111010110061001) 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, 1353781829240 + ... + 1353781829321.

It is an arithmetic number, because the mean of its divisors is an integer number (28429418414901).

Almost surely, 2^{111010110001001} is an apocalyptic number.

It is an amenable number.

111010110001001 is a deficient number, since it is larger than the sum of its proper divisors (2707563658603).

111010110001001 is an equidigital number, since it uses as much as digits as its factorization.

111010110001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707563658602.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 111010110001001 its reverse (100100011010111), we get a palindrome (211110121011112).

The spelling of 111010110001001 in words is "one hundred eleven trillion, ten billion, one hundred ten million, one thousand, one".