115123001721 has 64 divisors (see below), whose sum is σ = 190307335680. Its totient is φ = 60279367680.

The previous prime is 115123001713. The next prime is 115123001753. The reversal of 115123001721 is 127100321511.

It is not a de Polignac number, because 115123001721 - 2³ = 115123001713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 115123001691 and 115123001700.

It is not an unprimeable number, because it can be changed into a prime (115123001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38773525 + ... + 38776493.

It is an arithmetic number, because the mean of its divisors is an integer number (2973552120).

Almost surely, 2^115123001721 is an apocalyptic number.

It is an amenable number.

115123001721 is a deficient number, since it is larger than the sum of its proper divisors (75184333959).

115123001721 is a wasteful number, since it uses less digits than its factorization.

115123001721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986.

The product of its (nonzero) digits is 420, while the sum is 24.

The spelling of 115123001721 in words is "one hundred fifteen billion, one hundred twenty-three million, one thousand, seven hundred twenty-one".