12121322220111 has 12 divisors (see below), whose sum is σ = 17500607229768. Its totient is φ = 7459275212064.

The previous prime is 12121322220101. The next prime is 12121322220127. The reversal of 12121322220111 is 11102222312121.

It is not a de Polignac number, because 12121322220111 - 2⁹ = 12121322219599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121322220101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11953966180 + ... + 11953967193.

It is an arithmetic number, because the mean of its divisors is an integer number (1458383935814).

Almost surely, 2^{12121322220111} is an apocalyptic number.

12121322220111 is a deficient number, since it is larger than the sum of its proper divisors (5379285009657).

12121322220111 is a wasteful number, since it uses less digits than its factorization.

12121322220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23907933402 (or 23907933389 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12121322220111 its reverse (11102222312121), we get a palindrome (23223544532232).

The spelling of 12121322220111 in words is "twelve trillion, one hundred twenty-one billion, three hundred twenty-two million, two hundred twenty thousand, one hundred eleven".