9010021 has 4 divisors (see below), whose sum is σ = 9021600. Its totient is φ = 8998444.

The previous prime is 9010007. The next prime is 9010031. The reversal of 9010021 is 1200109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9010021 - 2⁵ = 9009989 is a prime.

It is an Ulam number.

It is a Duffinian number.

9010021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9009983 and 9010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9010031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4531 + ... + 6208.

It is an arithmetic number, because the mean of its divisors is an integer number (2255400).

Almost surely, 2^9010021 is an apocalyptic number.

It is an amenable number.

9010021 is a deficient number, since it is larger than the sum of its proper divisors (11579).

9010021 is a wasteful number, since it uses less digits than its factorization.

9010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11578.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 9010021 is about 3001.6697020159. The cubic root of 9010021 is about 208.0855555954.

The spelling of 9010021 in words is "nine million, ten thousand, twenty-one".