251129122116501 has 16 divisors (see below), whose sum is σ = 346447329782400. Its totient is φ = 161617242389568.

The previous prime is 251129122116497. The next prime is 251129122116533. The reversal of 251129122116501 is 105611221921152.

It is not a de Polignac number, because 251129122116501 - 2² = 251129122116497 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 251129122116501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251129122116581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259237761 + ... + 260204678.

It is an arithmetic number, because the mean of its divisors is an integer number (21652958111400).

Almost surely, 2^{251129122116501} is an apocalyptic number.

It is an amenable number.

251129122116501 is a deficient number, since it is larger than the sum of its proper divisors (95318207665899).

251129122116501 is a wasteful number, since it uses less digits than its factorization.

251129122116501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519448028.

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 251129122116501 in words is "two hundred fifty-one trillion, one hundred twenty-nine billion, one hundred twenty-two million, one hundred sixteen thousand, five hundred one".