12121322311211 has 16 divisors (see below), whose sum is σ = 13510354176000. Its totient is φ = 10807449326208.

The previous prime is 12121322311127. The next prime is 12121322311223. The reversal of 12121322311211 is 11211322312121.

It is a de Polignac number, because none of the positive numbers 2^k-12121322311211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121322311711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7816106 + ... + 9237648.

It is an arithmetic number, because the mean of its divisors is an integer number (844397136000).

Almost surely, 2^{12121322311211} is an apocalyptic number.

12121322311211 is a deficient number, since it is larger than the sum of its proper divisors (1389031864789).

12121322311211 is a wasteful number, since it uses less digits than its factorization.

12121322311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447978.

The product of its digits is 288, while the sum is 23.

Adding to 12121322311211 its reverse (11211322312121), we get a palindrome (23332644623332).

The spelling of 12121322311211 in words is "twelve trillion, one hundred twenty-one billion, three hundred twenty-two million, three hundred eleven thousand, two hundred eleven".