2129131656927 has 12 divisors (see below), whose sum is σ = 3354995338344. Its totient is φ = 1290382822320.

The previous prime is 2129131656919. The next prime is 2129131656937. The reversal of 2129131656927 is 7296561319212.

2129131656927 is a `hidden beast` number, since 2 + 1 + 29 + 1 + 31 + 6 + 569 + 27 = 666.

It is not a de Polignac number, because 2129131656927 - 2³ = 2129131656919 is a prime.

It is a super-2 number, since 2×2129131656927² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129131656907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10753190088 + ... + 10753190285.

It is an arithmetic number, because the mean of its divisors is an integer number (279582944862).

Almost surely, 2^{2129131656927} is an apocalyptic number.

2129131656927 is a deficient number, since it is larger than the sum of its proper divisors (1225863681417).

2129131656927 is a wasteful number, since it uses less digits than its factorization.

2129131656927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21506380390 (or 21506380387 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The spelling of 2129131656927 in words is "two trillion, one hundred twenty-nine billion, one hundred thirty-one million, six hundred fifty-six thousand, nine hundred twenty-seven".