12111105157 has 2 divisors, whose sum is σ = 12111105158. Its totient is φ = 12111105156.

The previous prime is 12111105151. The next prime is 12111105161. The reversal of 12111105157 is 75150111121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10636621956 + 1474483201 = 103134^2 + 38399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111105157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111105151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055552578 + 6055552579.

It is an arithmetic number, because the mean of its divisors is an integer number (6055552579).

Almost surely, 2^12111105157 is an apocalyptic number.

It is an amenable number.

12111105157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111105157 is an equidigital number, since it uses as much as digits as its factorization.

12111105157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 25.

Adding to 12111105157 its reverse (75150111121), we get a palindrome (87261216278).

The spelling of 12111105157 in words is "twelve billion, one hundred eleven million, one hundred five thousand, one hundred fifty-seven".