2012120112157 has 2 divisors, whose sum is σ = 2012120112158. Its totient is φ = 2012120112156.

The previous prime is 2012120112139. The next prime is 2012120112239. The reversal of 2012120112157 is 7512110212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1863317821156 + 148802291001 = 1365034^2 + 385749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012120112157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012120112757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006060056078 + 1006060056079.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060056079).

Almost surely, 2^{2012120112157} is an apocalyptic number.

It is an amenable number.

2012120112157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012120112157 is an equidigital number, since it uses as much as digits as its factorization.

2012120112157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 2012120112157 its reverse (7512110212102), we get a palindrome (9524230324259).

The spelling of 2012120112157 in words is "two trillion, twelve billion, one hundred twenty million, one hundred twelve thousand, one hundred fifty-seven".