1111101001001 has 4 divisors (see below), whose sum is σ = 1115027153232. Its totient is φ = 1107174848772.

The previous prime is 1111101000949. The next prime is 1111101001027. The reversal of 1111101001001 is 1001001011111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111101001001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111101001001.

It is not an unprimeable number, because it can be changed into a prime (1111101001081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1963075691 + ... + 1963076256.

It is an arithmetic number, because the mean of its divisors is an integer number (278756788308).

Almost surely, 2^{1111101001001} is an apocalyptic number.

It is an amenable number.

1111101001001 is a deficient number, since it is larger than the sum of its proper divisors (3926152231).

1111101001001 is an equidigital number, since it uses as much as digits as its factorization.

1111101001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926152230.

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

Adding to 1111101001001 its reverse (1001001011111), we get a palindrome (2112102012112).

It can be divided in two parts, 111110 and 1001001, that added together give a palindrome (1112111).

The spelling of 1111101001001 in words is "one trillion, one hundred eleven billion, one hundred one million, one thousand, one".