1000010021 has 8 divisors (see below), whose sum is σ = 1028469024. Its totient is φ = 971787600.

The previous prime is 1000009999. The next prime is 1000010029. The reversal of 1000010021 is 1200100001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000010021 - 2¹⁴ = 999993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000009987 and 1000010014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000010029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50555 + ... + 67496.

It is an arithmetic number, because the mean of its divisors is an integer number (128558628).

Almost surely, 2^1000010021 is an apocalyptic number.

It is an amenable number.

1000010021 is a deficient number, since it is larger than the sum of its proper divisors (28459003).

1000010021 is a wasteful number, since it uses less digits than its factorization.

1000010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118291.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1000010021 is about 31622.9350472090. The cubic root of 1000010021 is about 1000.0033403222.

Adding to 1000010021 its reverse (1200100001), we get a palindrome (2200110022).

The spelling of 1000010021 in words is "one billion, ten thousand, twenty-one".