1005530320021 has 16 divisors (see below), whose sum is σ = 1042094099200. Its totient is φ = 969569310528.

The previous prime is 1005530319977. The next prime is 1005530320031. The reversal of 1005530320021 is 1200230355001.

It is a cyclic number.

It is not a de Polignac number, because 1005530320021 - 2¹⁵ = 1005530287253 is a prime.

It is a super-2 number, since 2×1005530320021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005530319974 and 1005530320001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005530320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28071895 + ... + 28107691.

It is an arithmetic number, because the mean of its divisors is an integer number (65130881200).

Almost surely, 2^{1005530320021} is an apocalyptic number.

It is an amenable number.

1005530320021 is a deficient number, since it is larger than the sum of its proper divisors (36563779179).

1005530320021 is an equidigital number, since it uses as much as digits as its factorization.

1005530320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44188.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 1005530320021 its reverse (1200230355001), we get a palindrome (2205760675022).

The spelling of 1005530320021 in words is "one trillion, five billion, five hundred thirty million, three hundred twenty thousand, twenty-one".