12122222011 has 8 divisors (see below), whose sum is σ = 13045709664. Its totient is φ = 11222113920.

The previous prime is 12122221981. The next prime is 12122222027. The reversal of 12122222011 is 11022222121.

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 a de Polignac number, because none of the positive numbers 2^k-12122222011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122229011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5843815 + ... + 5845888.

It is an arithmetic number, because the mean of its divisors is an integer number (1630713708).

Almost surely, 2^12122222011 is an apocalyptic number.

12122222011 is a deficient number, since it is larger than the sum of its proper divisors (923487653).

12122222011 is a wasteful number, since it uses less digits than its factorization.

12122222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11689781.

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

Adding to 12122222011 its reverse (11022222121), we get a palindrome (23144444132).

The spelling of 12122222011 in words is "twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, eleven".