12101212111111 has 2 divisors, whose sum is σ = 12101212111112. Its totient is φ = 12101212111110.

The previous prime is 12101212111097. The next prime is 12101212111117. The reversal of 12101212111111 is 11111121210121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12101212111111 - 2¹⁵ = 12101212078343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101212111117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050606055555 + 6050606055556.

It is an arithmetic number, because the mean of its divisors is an integer number (6050606055556).

Almost surely, 2^{12101212111111} is an apocalyptic number.

12101212111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101212111111 is an equidigital number, since it uses as much as digits as its factorization.

12101212111111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12101212111111 its reverse (11111121210121), we get a palindrome (23212333321232).

The spelling of 12101212111111 in words is "twelve trillion, one hundred one billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".