11212011 has 6 divisors (see below), whose sum is σ = 16195140.
Its totient is φ = 7474668.
The previous prime is 11212001. The next prime is 11212013. The reversal of 11212011 is 11021211.
It is a happy number.
It is not a de Polignac number, because 11212011 - 27 = 11211883 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1245779 = 11212011 / (1 + 1 + 2 + 1 + 2 + 0 + 1 + 1).
It is a junction number, because it is equal to n+sod(n) for n = 11211984 and 11212002.
It is not an unprimeable number, because it can be changed into a prime (11212013) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622881 + ... + 622898.
It is an arithmetic number, because the mean of its divisors is an integer number (2699190).
Almost surely, 211212011 is an apocalyptic number.
11212011 is a deficient number, since it is larger than the sum of its proper divisors (4983129).
11212011 is a wasteful number, since it uses less digits than its factorization.
11212011 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1245785 (or 1245782 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 11212011 is about 3348.4341116408.
The cubic root of 11212011 is about 223.8177394435.
Adding to 11212011 its reverse (11021211), we get a palindrome (22233222).
The spelling of 11212011 in words is "eleven million, two hundred twelve thousand, eleven".