12120111012173 has 2 divisors, whose sum is σ = 12120111012174. Its totient is φ = 12120111012172.

The previous prime is 12120111012091. The next prime is 12120111012187. The reversal of 12120111012173 is 37121011102121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11259366828004 + 860744184169 = 3355498^2 + 927763^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120111012173 - 2²⁴ = 12120094234957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120111012773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060055506086 + 6060055506087.

It is an arithmetic number, because the mean of its divisors is an integer number (6060055506087).

Almost surely, 2^{12120111012173} is an apocalyptic number.

It is an amenable number.

12120111012173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120111012173 is an equidigital number, since it uses as much as digits as its factorization.

12120111012173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 12120111012173 its reverse (37121011102121), we get a palindrome (49241122114294).

The spelling of 12120111012173 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, twelve thousand, one hundred seventy-three".