2129079887291 has 4 divisors (see below), whose sum is σ = 2433234156912. Its totient is φ = 1824925617672.

The previous prime is 2129079887279. The next prime is 2129079887371. The reversal of 2129079887291 is 1927889709212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2129079887291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129079887491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152077134800 + ... + 152077134813.

It is an arithmetic number, because the mean of its divisors is an integer number (608308539228).

Almost surely, 2^{2129079887291} is an apocalyptic number.

2129079887291 is a deficient number, since it is larger than the sum of its proper divisors (304154269621).

2129079887291 is an equidigital number, since it uses as much as digits as its factorization.

2129079887291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304154269620.

The product of its (nonzero) digits is 18289152, while the sum is 65.

The spelling of 2129079887291 in words is "two trillion, one hundred twenty-nine billion, seventy-nine million, eight hundred eighty-seven thousand, two hundred ninety-one".