1000130021 has 16 divisors (see below), whose sum is σ = 1103654400. Its totient is φ = 898769520.

The previous prime is 1000130011. The next prime is 1000130039. The reversal of 1000130021 is 1200310001.

It is not a de Polignac number, because 1000130021 - 2¹⁴ = 1000113637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000129990 and 1000130008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000130011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355406 + ... + 358208.

It is an arithmetic number, because the mean of its divisors is an integer number (68978400).

Almost surely, 2^1000130021 is an apocalyptic number.

1000130021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000130021 is a deficient number, since it is larger than the sum of its proper divisors (103524379).

1000130021 is a wasteful number, since it uses less digits than its factorization.

1000130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1000130021 is about 31624.8323473817. The cubic root of 1000130021 is about 1000.0433384551.

Adding to 1000130021 its reverse (1200310001), we get a palindrome (2200440022).

The spelling of 1000130021 in words is "one billion, one hundred thirty thousand, twenty-one".