12112111121977 has 2 divisors, whose sum is σ = 12112111121978. Its totient is φ = 12112111121976.

The previous prime is 12112111121951. The next prime is 12112111122011. The reversal of 12112111121977 is 77912111121121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11507909613561 + 604201508416 = 3392331^2 + 777304^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112111121977 - 2¹⁹ = 12112110597689 is a prime.

It is a super-2 number, since 2×12112111121977² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12112111131977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056055560988 + 6056055560989.

It is an arithmetic number, because the mean of its divisors is an integer number (6056055560989).

Almost surely, 2^{12112111121977} is an apocalyptic number.

It is an amenable number.

12112111121977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112111121977 is an equidigital number, since it uses as much as digits as its factorization.

12112111121977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 37.

The spelling of 12112111121977 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred seventy-seven".