12101020012157 has 2 divisors, whose sum is σ = 12101020012158. Its totient is φ = 12101020012156.

The previous prime is 12101020012043. The next prime is 12101020012219. The reversal of 12101020012157 is 75121002010121.

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., 10230747690916 + 1870272321241 = 3198554^2 + 1367579^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101020012157 - 2⁸ = 12101020011901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101020012457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050510006078 + 6050510006079.

It is an arithmetic number, because the mean of its divisors is an integer number (6050510006079).

Almost surely, 2^{12101020012157} is an apocalyptic number.

It is an amenable number.

12101020012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101020012157 is an equidigital number, since it uses as much as digits as its factorization.

12101020012157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 12101020012157 its reverse (75121002010121), we get a palindrome (87222022022278).

The spelling of 12101020012157 in words is "twelve trillion, one hundred one billion, twenty million, twelve thousand, one hundred fifty-seven".