44121717721 has 4 divisors (see below), whose sum is σ = 44168309712. Its totient is φ = 44075125732.

The previous prime is 44121717707. The next prime is 44121717733. The reversal of 44121717721 is 12771712144.

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.

It is a cyclic number.

It is not a de Polignac number, because 44121717721 - 2²¹ = 44119620569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44121717701) 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 3 ways as a sum of consecutive naturals, for example, 23294575 + ... + 23296468.

It is an arithmetic number, because the mean of its divisors is an integer number (11042077428).

Almost surely, 2^44121717721 is an apocalyptic number.

It is an amenable number.

44121717721 is a deficient number, since it is larger than the sum of its proper divisors (46591991).

44121717721 is an equidigital number, since it uses as much as digits as its factorization.

44121717721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46591990.

The product of its digits is 21952, while the sum is 37.

The spelling of 44121717721 in words is "forty-four billion, one hundred twenty-one million, seven hundred seventeen thousand, seven hundred twenty-one".