2126173129305 has 32 divisors (see below), whose sum is σ = 3404619630720. Its totient is φ = 1133045114880.

The previous prime is 2126173129303. The next prime is 2126173129361. The reversal of 2126173129305 is 5039213716212.

It is not a de Polignac number, because 2126173129305 - 2¹ = 2126173129303 is a prime.

It is a super-4 number, since 4×2126173129305⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2126173129303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209202154 + ... + 209212316.

It is an arithmetic number, because the mean of its divisors is an integer number (106394363460).

Almost surely, 2^{2126173129305} is an apocalyptic number.

It is an amenable number.

2126173129305 is a deficient number, since it is larger than the sum of its proper divisors (1278446501415).

2126173129305 is a wasteful number, since it uses less digits than its factorization.

2126173129305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20041.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 2126173129305 in words is "two trillion, one hundred twenty-six billion, one hundred seventy-three million, one hundred twenty-nine thousand, three hundred five".