12011222122 has 4 divisors (see below), whose sum is σ = 18016833186. Its totient is φ = 6005611060.

The previous prime is 12011222107. The next prime is 12011222129. The reversal of 12011222122 is 22122211021.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10844931321 + 1166290801 = 104139^2 + 34151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12011222096 and 12011222105.

It is not an unprimeable number, because it can be changed into a prime (12011222129) 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 as a sum of consecutive naturals, namely, 3002805529 + ... + 3002805532.

Almost surely, 2^12011222122 is an apocalyptic number.

12011222122 is a deficient number, since it is larger than the sum of its proper divisors (6005611064).

12011222122 is an equidigital number, since it uses as much as digits as its factorization.

12011222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005611063.

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

Adding to 12011222122 its reverse (22122211021), we get a palindrome (34133433143).

The spelling of 12011222122 in words is "twelve billion, eleven million, two hundred twenty-two thousand, one hundred twenty-two".