11212101211 has 4 divisors (see below), whose sum is σ = 11280887272. Its totient is φ = 11143315152.

The previous prime is 11212101209. The next prime is 11212101247. The reversal of 11212101211 is 11210121211.

It is a happy number.

11212101211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11210121211 = 66587 ⋅168353.

It is a cyclic number.

It is not a de Polignac number, because 11212101211 - 2¹ = 11212101209 is a prime.

It is a super-2 number, since 2×11212101211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212101191 and 11212101200.

It is not an unprimeable number, because it can be changed into a prime (11212101811) 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 3 ways as a sum of consecutive naturals, for example, 34392786 + ... + 34393111.

It is an arithmetic number, because the mean of its divisors is an integer number (2820221818).

Almost surely, 2^11212101211 is an apocalyptic number.

11212101211 is a deficient number, since it is larger than the sum of its proper divisors (68786061).

11212101211 is an equidigital number, since it uses as much as digits as its factorization.

11212101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68786060.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212101211 its reverse (11210121211), we get a palindrome (22422222422).

The spelling of 11212101211 in words is "eleven billion, two hundred twelve million, one hundred one thousand, two hundred eleven".