11111211001 has 8 divisors (see below), whose sum is σ = 12759285600. Its totient is φ = 9569463840.

The previous prime is 11111210983. The next prime is 11111211031. The reversal of 11111211001 is 10011211111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111211001 - 2²⁹ = 10574340089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111211031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26581636 + ... + 26582053.

It is an arithmetic number, because the mean of its divisors is an integer number (1594910700).

Almost surely, 2^11111211001 is an apocalyptic number.

11111211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111211001 is a deficient number, since it is larger than the sum of its proper divisors (1648074599).

11111211001 is a wasteful number, since it uses less digits than its factorization.

11111211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53163719.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 11111211001 its reverse (10011211111), we get a palindrome (21122422112).

The spelling of 11111211001 in words is "eleven billion, one hundred eleven million, two hundred eleven thousand, one".