12121222011222 has 16 divisors (see below), whose sum is σ = 24246465067440. Its totient is φ = 4039737162912.

The previous prime is 12121222011193. The next prime is 12121222011307. The reversal of 12121222011222 is 22211022212121.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 167504353 + ... + 167576700.

It is an arithmetic number, because the mean of its divisors is an integer number (1515404066715).

Almost surely, 2^{12121222011222} is an apocalyptic number.

12121222011222 is an abundant number, since it is smaller than the sum of its proper divisors (12125243056218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121222011222 is a wasteful number, since it uses less digits than its factorization.

12121222011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335087087.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12121222011222 its reverse (22211022212121), we get a palindrome (34332244223343).

The spelling of 12121222011222 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred twenty-two".