2129379820191 has 24 divisors (see below), whose sum is σ = 3325565342736. Its totient is φ = 1305166896000.

The previous prime is 2129379820157. The next prime is 2129379820241. The reversal of 2129379820191 is 1910289739212.

2129379820191 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 379 + 82 + 0 + 191 = 666.

It is not a de Polignac number, because 2129379820191 - 2²⁹ = 2128842949279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129379820111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36225270 + ... + 36284003.

It is an arithmetic number, because the mean of its divisors is an integer number (138565222614).

Almost surely, 2^{2129379820191} is an apocalyptic number.

2129379820191 is a deficient number, since it is larger than the sum of its proper divisors (1196185522545).

2129379820191 is a wasteful number, since it uses less digits than its factorization.

2129379820191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72509543 (or 72509540 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 2129379820191 in words is "two trillion, one hundred twenty-nine billion, three hundred seventy-nine million, eight hundred twenty thousand, one hundred ninety-one".