11212212011 has 32 divisors (see below), whose sum is σ = 15939721728. Its totient is φ = 7590320640.

The previous prime is 11212211993. The next prime is 11212212013. The reversal of 11212212011 is 11021221211.

11212212011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11212212011 - 2²⁶ = 11145103147 is a prime.

It is a super-2 number, since 2×11212212011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212212013) 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 31 ways as a sum of consecutive naturals, for example, 312425 + ... + 346458.

It is an arithmetic number, because the mean of its divisors is an integer number (498116304).

Almost surely, 2^11212212011 is an apocalyptic number.

11212212011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11212212011 is a deficient number, since it is larger than the sum of its proper divisors (4727509717).

11212212011 is a wasteful number, since it uses less digits than its factorization.

11212212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658931.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212212011 its reverse (11021221211), we get a palindrome (22233433222).

The spelling of 11212212011 in words is "eleven billion, two hundred twelve million, two hundred twelve thousand, eleven".