1020006644321 has 6 divisors (see below), whose sum is σ = 1186538341410. Its totient is φ = 874291409376.

The previous prime is 1020006644273. The next prime is 1020006644347. The reversal of 1020006644321 is 1234466000201.

It can be written as a sum of positive squares in only one way, i.e., 1018210156096 + 1796488225 = 1009064^2 + 42385^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1020006644321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020006644221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10408231016 + ... + 10408231113.

It is an arithmetic number, because the mean of its divisors is an integer number (197756390235).

Almost surely, 2^{1020006644321} is an apocalyptic number.

It is an amenable number.

1020006644321 is a deficient number, since it is larger than the sum of its proper divisors (166531697089).

1020006644321 is an equidigital number, since it uses as much as digits as its factorization.

1020006644321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816462143 (or 20816462136 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 1020006644321 in words is "one trillion, twenty billion, six million, six hundred forty-four thousand, three hundred twenty-one".