1111002011001 has 12 divisors (see below), whose sum is σ = 1605392994660. Its totient is φ = 740385401760.

The previous prime is 1111002010991. The next prime is 1111002011029. The reversal of 1111002011001 is 1001102001111.

It can be written as a sum of positive squares in 2 ways, for example, as 505593524601 + 605408486400 = 711051^2 + 778080^2 .

It is not a de Polignac number, because 1111002011001 - 2¹⁰ = 1111002009977 is a prime.

It is a super-2 number, since 2×1111002011001² (a number of 25 digits) contains 22 as substring.

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 (1111002011071) 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 11 ways as a sum of consecutive naturals, for example, 23525566 + ... + 23572743.

It is an arithmetic number, because the mean of its divisors is an integer number (133782749555).

Almost surely, 2^{1111002011001} is an apocalyptic number.

It is an amenable number.

1111002011001 is a deficient number, since it is larger than the sum of its proper divisors (494390983659).

1111002011001 is a wasteful number, since it uses less digits than its factorization.

1111002011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47100936 (or 47100933 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1111002011001 its reverse (1001102001111), we get a palindrome (2112104012112).

The spelling of 1111002011001 in words is "one trillion, one hundred eleven billion, two million, eleven thousand, one".