12111020020111 has 2 divisors, whose sum is σ = 12111020020112. Its totient is φ = 12111020020110.

The previous prime is 12111020020097. The next prime is 12111020020123. The reversal of 12111020020111 is 11102002011121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111020020111 - 2²¹ = 12111017922959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111020020091 and 12111020020100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111020024111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055510010055 + 6055510010056.

It is an arithmetic number, because the mean of its divisors is an integer number (6055510010056).

Almost surely, 2^{12111020020111} is an apocalyptic number.

12111020020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111020020111 is an equidigital number, since it uses as much as digits as its factorization.

12111020020111 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 13.

Adding to 12111020020111 its reverse (11102002011121), we get a palindrome (23213022031232).

The spelling of 12111020020111 in words is "twelve trillion, one hundred eleven billion, twenty million, twenty thousand, one hundred eleven".