12121221212122 has 32 divisors (see below), whose sum is σ = 19905536613888. Its totient is φ = 5489994510000.

The previous prime is 12121221212053. The next prime is 12121221212141. The reversal of 12121221212122 is 22121212212121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12121221212093 and 12121221212102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12878797 + ... + 13787887.

It is an arithmetic number, because the mean of its divisors is an integer number (622048019184).

Almost surely, 2^{12121221212122} is an apocalyptic number.

12121221212122 is a deficient number, since it is larger than the sum of its proper divisors (7784315401766).

12121221212122 is a wasteful number, since it uses less digits than its factorization.

12121221212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911266.

The product of its digits is 256, while the sum is 22.

Adding to 12121221212122 its reverse (22121212212121), we get a palindrome (34242433424243).

Subtracting 12121221212122 from its reverse (22121212212121), we obtain a palindrome (9999990999999).

It can be divided in two parts, 121212212121 and 22, that multiplied together give a palindrome (2666668666662).

The spelling of 12121221212122 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".