12121112120111 has 2 divisors, whose sum is σ = 12121112120112. Its totient is φ = 12121112120110.

The previous prime is 12121112120099. The next prime is 12121112120141. The reversal of 12121112120111 is 11102121112121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12121112120111 - 2¹⁰ = 12121112119087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12121112120111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121112120141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060556060055 + 6060556060056.

It is an arithmetic number, because the mean of its divisors is an integer number (6060556060056).

Almost surely, 2^{12121112120111} is an apocalyptic number.

12121112120111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121112120111 is an equidigital number, since it uses as much as digits as its factorization.

12121112120111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12121112120111 its reverse (11102121112121), we get a palindrome (23223233232232).

The spelling of 12121112120111 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty thousand, one hundred eleven".