1000013021 has 12 divisors (see below), whose sum is σ = 1213859232. Its totient is φ = 819885528.

The previous prime is 1000013017. The next prime is 1000013029. The reversal of 1000013021 is 1203100001.

It is not a de Polignac number, because 1000013021 - 2² = 1000013017 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 (1000013029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442535 + ... + 444788.

It is an arithmetic number, because the mean of its divisors is an integer number (101154936).

Almost surely, 2^1000013021 is an apocalyptic number.

It is an amenable number.

1000013021 is a deficient number, since it is larger than the sum of its proper divisors (213846211).

1000013021 is an equidigital number, since it uses as much as digits as its factorization.

1000013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887360 (or 887353 counting only the distinct ones).

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

The square root of 1000013021 is about 31622.9824811007. The cubic root of 1000013021 is about 1000.0043403145.

Adding to 1000013021 its reverse (1203100001), we get a palindrome (2203113022).

The spelling of 1000013021 in words is "one billion, thirteen thousand, twenty-one".