449321017021 has 4 divisors (see below), whose sum is σ = 449340228252. Its totient is φ = 449301805792.

The previous prime is 449321016979. The next prime is 449321017031. The reversal of 449321017021 is 120710123944.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112636756996 + 336684260025 = 335614^2 + 580245^2 .

It is a cyclic number.

It is not a de Polignac number, because 449321017021 - 2¹¹ = 449321014973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449321017031) 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, 9570490 + ... + 9617323.

It is an arithmetic number, because the mean of its divisors is an integer number (112335057063).

Almost surely, 2^449321017021 is an apocalyptic number.

It is an amenable number.

449321017021 is a deficient number, since it is larger than the sum of its proper divisors (19211231).

449321017021 is a wasteful number, since it uses less digits than its factorization.

449321017021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19211230.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 449321017021 in words is "four hundred forty-nine billion, three hundred twenty-one million, seventeen thousand, twenty-one".