12121222011122 has 12 divisors (see below), whose sum is σ = 21150295550190. Its totient is φ = 5194809433296.

The previous prime is 12121222011103. The next prime is 12121222011131. The reversal of 12121222011122 is 22111022212121.

It can be written as a sum of positive squares in only one way, i.e., 11714676774241 + 406545236881 = 3422671^2 + 637609^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12121222011094 and 12121222011103.

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, 61842969347 + ... + 61842969542.

Almost surely, 2^{12121222011122} is an apocalyptic number.

12121222011122 is a deficient number, since it is larger than the sum of its proper divisors (9029073539068).

12121222011122 is a wasteful number, since it uses less digits than its factorization.

12121222011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123685938905 (or 123685938898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12121222011122 its reverse (22111022212121), we get a palindrome (34232244223243).

The spelling of 12121222011122 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-two".