11105212331 has 4 divisors (see below), whose sum is σ = 11173342632. Its totient is φ = 11037082032.

The previous prime is 11105212289. The next prime is 11105212357. The reversal of 11105212331 is 13321250111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11105212331 is a prime.

It is a super-2 number, since 2×11105212331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11105214331) 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 3 ways as a sum of consecutive naturals, for example, 34064906 + ... + 34065231.

It is an arithmetic number, because the mean of its divisors is an integer number (2793335658).

Almost surely, 2^11105212331 is an apocalyptic number.

11105212331 is a deficient number, since it is larger than the sum of its proper divisors (68130301).

11105212331 is an equidigital number, since it uses as much as digits as its factorization.

11105212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68130300.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 11105212331 its reverse (13321250111), we get a palindrome (24426462442).

The spelling of 11105212331 in words is "eleven billion, one hundred five million, two hundred twelve thousand, three hundred thirty-one".