11331111211 has 8 divisors (see below), whose sum is σ = 12953486304. Its totient is φ = 9709647360.

The previous prime is 11331111157. The next prime is 11331111223. The reversal of 11331111211 is 11211113311.

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

It is a de Polignac number, because none of the positive numbers 2^k-11331111211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331111271) 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, 200950 + ... + 251083.

It is an arithmetic number, because the mean of its divisors is an integer number (1619185788).

Almost surely, 2^11331111211 is an apocalyptic number.

11331111211 is a deficient number, since it is larger than the sum of its proper divisors (1622375093).

11331111211 is an equidigital number, since it uses as much as digits as its factorization.

11331111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455621.

The product of its digits is 18, while the sum is 16.

Adding to 11331111211 its reverse (11211113311), we get a palindrome (22542224522).

The spelling of 11331111211 in words is "eleven billion, three hundred thirty-one million, one hundred eleven thousand, two hundred eleven".