11212111105 has 8 divisors (see below), whose sum is σ = 14489497512. Its totient is φ = 8279712768.

The previous prime is 11212111087. The next prime is 11212111123. The reversal of 11212111105 is 50111121211.

It is an interprime number because it is at equal distance from previous prime (11212111087) and next prime (11212111123).

It can be written as a sum of positive squares in 4 ways, for example, as 335915584 + 10876195521 = 18328^2 + 104289^2 .

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 11212111105 - 2¹⁵ = 11212078337 is a prime.

It is a super-2 number, since 2×11212111105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86246944 + ... + 86247073.

It is an arithmetic number, because the mean of its divisors is an integer number (1811187189).

Almost surely, 2^11212111105 is an apocalyptic number.

It is an amenable number.

11212111105 is a deficient number, since it is larger than the sum of its proper divisors (3277386407).

11212111105 is a wasteful number, since it uses less digits than its factorization.

11212111105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172494035.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 11212111105 its reverse (50111121211), we get a palindrome (61323232316).

The spelling of 11212111105 in words is "eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred five".