1111001101001 has 64 divisors (see below), whose sum is σ = 1281076549632. Its totient is φ = 962632440000.

The previous prime is 1111001100947. The next prime is 1111001101003. The reversal of 1111001101001 is 1001011001111.

It is a de Polignac number, because none of the positive numbers 2^k-1111001101001 is a prime.

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 1111001101001.

It is not an unprimeable number, because it can be changed into a prime (1111001101003) 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 63 ways as a sum of consecutive naturals, for example, 410416490 + ... + 410419196.

It is an arithmetic number, because the mean of its divisors is an integer number (20016821088).

Almost surely, 2^{1111001101001} is an apocalyptic number.

1111001101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111001101001 is a deficient number, since it is larger than the sum of its proper divisors (170075448631).

1111001101001 is a wasteful number, since it uses less digits than its factorization.

1111001101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 2933 counting only the distinct ones).

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

Adding to 1111001101001 its reverse (1001011001111), we get a palindrome (2112012102112).

It can be divided in two parts, 111100110 and 1001, that added together give a palindrome (111101111).

The spelling of 1111001101001 in words is "one trillion, one hundred eleven billion, one million, one hundred one thousand, one".