115868041921 has 4 divisors (see below), whose sum is σ = 115868770992. Its totient is φ = 115867312852.

The previous prime is 115868041897. The next prime is 115868042023. The reversal of 115868041921 is 129140868511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 115868041921 - 2²¹ = 115865944769 is a prime.

It is a super-2 number, since 2×115868041921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115868041721) 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, 13411 + ... + 481576.

It is an arithmetic number, because the mean of its divisors is an integer number (28967192748).

Almost surely, 2^115868041921 is an apocalyptic number.

It is an amenable number.

115868041921 is a deficient number, since it is larger than the sum of its proper divisors (729071).

115868041921 is an equidigital number, since it uses as much as digits as its factorization.

115868041921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729070.

The product of its (nonzero) digits is 138240, while the sum is 46.

The spelling of 115868041921 in words is "one hundred fifteen billion, eight hundred sixty-eight million, forty-one thousand, nine hundred twenty-one".