12120220211111 has 2 divisors, whose sum is σ = 12120220211112. Its totient is φ = 12120220211110.

The previous prime is 12120220211069. The next prime is 12120220211117. The reversal of 12120220211111 is 11111202202121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12120220211111 - 2³⁴ = 12103040341927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12120220211111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120220211117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060110105555 + 6060110105556.

It is an arithmetic number, because the mean of its divisors is an integer number (6060110105556).

Almost surely, 2^{12120220211111} is an apocalyptic number.

12120220211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120220211111 is an equidigital number, since it uses as much as digits as its factorization.

12120220211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12120220211111 its reverse (11111202202121), we get a palindrome (23231422413232).

The spelling of 12120220211111 in words is "twelve trillion, one hundred twenty billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".