12121212011222 has 16 divisors (see below), whose sum is σ = 18314367030672. Its totient is φ = 6016493639520.

The previous prime is 12121212011221. The next prime is 12121212011269. The reversal of 12121212011222 is 22211021212121.

It is a junction number, because it is equal to n+sod(n) for n = 12121212011194 and 12121212011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121212011221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17315804 + ... + 18002207.

It is an arithmetic number, because the mean of its divisors is an integer number (1144647939417).

Almost surely, 2^{12121212011222} is an apocalyptic number.

12121212011222 is a deficient number, since it is larger than the sum of its proper divisors (6193155019450).

12121212011222 is a wasteful number, since it uses less digits than its factorization.

12121212011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35319263.

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

Adding to 12121212011222 its reverse (22211021212121), we get a palindrome (34332233223343).

The spelling of 12121212011222 in words is "twelve trillion, one hundred twenty-one billion, two hundred twelve million, eleven thousand, two hundred twenty-two".