12212222011 has 4 divisors (see below), whose sum is σ = 13322424024. Its totient is φ = 11102020000.

The previous prime is 12212221997. The next prime is 12212222027. The reversal of 12212222011 is 11022221221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12212222011 - 2¹⁷ = 12212090939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212222081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555100990 + ... + 555101011.

It is an arithmetic number, because the mean of its divisors is an integer number (3330606006).

Almost surely, 2^12212222011 is an apocalyptic number.

12212222011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12212222011 is a deficient number, since it is larger than the sum of its proper divisors (1110202013).

12212222011 is a wasteful number, since it uses less digits than its factorization.

12212222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110202012.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212222011 its reverse (11022221221), we get a palindrome (23234443232).

The spelling of 12212222011 in words is "twelve billion, two hundred twelve million, two hundred twenty-two thousand, eleven".