12112220101 has 2 divisors, whose sum is σ = 12112220102. Its totient is φ = 12112220100.

The previous prime is 12112220047. The next prime is 12112220119. The reversal of 12112220101 is 10102221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11505780225 + 606439876 = 107265^2 + 24626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112220101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112220161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056110050 + 6056110051.

It is an arithmetic number, because the mean of its divisors is an integer number (6056110051).

Almost surely, 2^12112220101 is an apocalyptic number.

It is an amenable number.

12112220101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112220101 is an equidigital number, since it uses as much as digits as its factorization.

12112220101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12112220101 its reverse (10102221121), we get a palindrome (22214441222).

The spelling of 12112220101 in words is "twelve billion, one hundred twelve million, two hundred twenty thousand, one hundred one".