12011220122 has 12 divisors (see below), whose sum is σ = 19803623658. Its totient is φ = 5459645400.

The previous prime is 12011220107. The next prime is 12011220157. The reversal of 12011220122 is 22102211021.

It can be written as a sum of positive squares in only one way, i.e., 11885578441 + 125641681 = 109021^2 + 11209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12011220097 and 12011220106.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 24816329 + ... + 24816812.

Almost surely, 2^12011220122 is an apocalyptic number.

12011220122 is a deficient number, since it is larger than the sum of its proper divisors (7792403536).

12011220122 is a wasteful number, since it uses less digits than its factorization.

12011220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49633165 (or 49633154 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12011220122 its reverse (22102211021), we get a palindrome (34113431143).

The spelling of 12011220122 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred twenty-two".