12211011 has 24 divisors (see below), whose sum is σ = 18258240.
Its totient is φ = 7859376.
The previous prime is 12211009. The next prime is 12211021. The reversal of 12211011 is 11011221.
It is a happy number.
12211011 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 12211011 - 21 = 12211009 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a junction number, because it is equal to n+sod(n) for n = 12210984 and 12211002.
It is not an unprimeable number, because it can be changed into a prime (12211021) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53680 + ... + 53906.
It is an arithmetic number, because the mean of its divisors is an integer number (760760).
Almost surely, 212211011 is an apocalyptic number.
12211011 is a deficient number, since it is larger than the sum of its proper divisors (6047229).
12211011 is a wasteful number, since it uses less digits than its factorization.
12211011 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 415 (or 412 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 12211011 is about 3494.4257038890.
The cubic root of 12211011 is about 230.2769882811.
Adding to 12211011 its reverse (11011221), we get a palindrome (23222232).
The spelling of 12211011 in words is "twelve million, two hundred eleven thousand, eleven".