11112011001 has 40 divisors (see below), whose sum is σ = 20430073664. Its totient is φ = 5861276640.

The previous prime is 11112010991. The next prime is 11112011041. The reversal of 11112011001 is 10011021111.

It is not a de Polignac number, because 11112011001 - 2¹¹ = 11112008953 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 (11112011041) 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 39 ways as a sum of consecutive naturals, for example, 746395 + ... + 761136.

Almost surely, 2^11112011001 is an apocalyptic number.

It is an amenable number.

11112011001 is a deficient number, since it is larger than the sum of its proper divisors (9318062663).

11112011001 is a wasteful number, since it uses less digits than its factorization.

11112011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507563 (or 1507554 counting only the distinct ones).

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

Adding to 11112011001 its reverse (10011021111), we get a palindrome (21123032112).

The spelling of 11112011001 in words is "eleven billion, one hundred twelve million, eleven thousand, one".