4044665520121 has 8 divisors (see below), whose sum is σ = 4046751934344. Its totient is φ = 4042579647360.

The previous prime is 4044665520109. The next prime is 4044665520139. The reversal of 4044665520121 is 1210255664404.

It can be written as a sum of positive squares in 4 ways, for example, as 257500428025 + 3787165092096 = 507445^2 + 1946064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4044665520121 - 2¹¹ = 4044665518073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4044665520101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15256131 + ... + 15518983.

It is an arithmetic number, because the mean of its divisors is an integer number (505843991793).

Almost surely, 2^{4044665520121} is an apocalyptic number.

It is an amenable number.

4044665520121 is a deficient number, since it is larger than the sum of its proper divisors (2086414223).

4044665520121 is a wasteful number, since it uses less digits than its factorization.

4044665520121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270731.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 4044665520121 in words is "four trillion, forty-four billion, six hundred sixty-five million, five hundred twenty thousand, one hundred twenty-one".