12161111201 has 2 divisors, whose sum is σ = 12161111202. Its totient is φ = 12161111200.

The previous prime is 12161111167. The next prime is 12161111203. The reversal of 12161111201 is 10211116121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12156165025 + 4946176 = 110255^2 + 2224^2 .

It is an emirp because it is prime and its reverse (10211116121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12161111201 - 2²⁶ = 12094002337 is a prime.

Together with 12161111203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12161111201.

It is not a weakly prime, because it can be changed into another prime (12161111203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6080555600 + 6080555601.

It is an arithmetic number, because the mean of its divisors is an integer number (6080555601).

Almost surely, 2^12161111201 is an apocalyptic number.

It is an amenable number.

12161111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161111201 is an equidigital number, since it uses as much as digits as its factorization.

12161111201 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 12161111201 its reverse (10211116121), we get a palindrome (22372227322).

The spelling of 12161111201 in words is "twelve billion, one hundred sixty-one million, one hundred eleven thousand, two hundred one".