12101211 has 8 divisors (see below), whose sum is σ = 17927760.
Its totient is φ = 8067456.
The previous prime is 12101179. The next prime is 12101227. The reversal of 12101211 is 11210121.
Adding to 12101211 its reverse (11210121), we get a palindrome (23311332).
It is a happy number.
It is not a de Polignac number, because 12101211 - 25 = 12101179 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 = 12101193 and 12101202.
It is not an unprimeable number, because it can be changed into a prime (12100211) 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 7 ways as a sum of consecutive naturals, for example, 224070 + ... + 224123.
It is an arithmetic number, because the mean of its divisors is an integer number (2240970).
Almost surely, 212101211 is an apocalyptic number.
12101211 is a deficient number, since it is larger than the sum of its proper divisors (5826549).
12101211 is an equidigital number, since it uses as much as digits as its factorization.
12101211 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 448202 (or 448196 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 12101211 is about 3478.6794908413.
The cubic root of 12101211 is about 229.5847011036.
The spelling of 12101211 in words is "twelve million, one hundred one thousand, two hundred eleven".