11231111211 has 8 divisors (see below), whose sum is σ = 15293428224. Its totient is φ = 7328100840.

The previous prime is 11231111207. The next prime is 11231111257. The reversal of 11231111211 is 11211113211.

11231111211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11231111211 - 2² = 11231111207 is a prime.

It is a super-2 number, since 2×11231111211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231111011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39826495 + ... + 39826776.

It is an arithmetic number, because the mean of its divisors is an integer number (1911678528).

Almost surely, 2^11231111211 is an apocalyptic number.

11231111211 is a deficient number, since it is larger than the sum of its proper divisors (4062317013).

11231111211 is an equidigital number, since it uses as much as digits as its factorization.

11231111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79653321.

The product of its digits is 12, while the sum is 15.

Adding to 11231111211 its reverse (11211113211), we get a palindrome (22442224422).

The spelling of 11231111211 in words is "eleven billion, two hundred thirty-one million, one hundred eleven thousand, two hundred eleven".