12112161101 has 2 divisors, whose sum is σ = 12112161102. Its totient is φ = 12112161100.

The previous prime is 12112161079. The next prime is 12112161107. The reversal of 12112161101 is 10116121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7471009225 + 4641151876 = 86435^2 + 68126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112161101 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112161101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112161107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056080550 + 6056080551.

It is an arithmetic number, because the mean of its divisors is an integer number (6056080551).

Almost surely, 2^12112161101 is an apocalyptic number.

It is an amenable number.

12112161101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112161101 is an equidigital number, since it uses as much as digits as its factorization.

12112161101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 12112161101 its reverse (10116121121), we get a palindrome (22228282222).

The spelling of 12112161101 in words is "twelve billion, one hundred twelve million, one hundred sixty-one thousand, one hundred one".