12222011 has 8 divisors (see below), whose sum is σ = 12556800. Its totient is φ = 11891880.

The previous prime is 12221981. The next prime is 12222013. The reversal of 12222011 is 11022221.

12222011 = 220² + 221² + ... + 361².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12222011 - 2¹⁸ = 11959867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221983 and 12222001.

It is not an unprimeable number, because it can be changed into a prime (12222013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4520 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (1569600).

Almost surely, 2^12222011 is an apocalyptic number.

12222011 is a deficient number, since it is larger than the sum of its proper divisors (334789).

12222011 is an equidigital number, since it uses as much as digits as its factorization.

12222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12222011 is about 3495.9992848970. Note that the first 3 decimals coincide. The cubic root of 12222011 is about 230.3461140519.

Adding to 12222011 its reverse (11022221), we get a palindrome (23244232).

The spelling of 12222011 in words is "twelve million, two hundred twenty-two thousand, eleven".