10021021 has 8 divisors (see below), whose sum is σ = 10307264. Its totient is φ = 9737280.

The previous prime is 10021003. The next prime is 10021027. The reversal of 10021021 is 12012001.

10021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10021021 - 2⁹ = 10020509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020995 and 10021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9880 + ... + 10846.

It is an arithmetic number, because the mean of its divisors is an integer number (1288408).

Almost surely, 2^10021021 is an apocalyptic number.

It is an amenable number.

10021021 is a deficient number, since it is larger than the sum of its proper divisors (286243).

10021021 is an equidigital number, since it uses as much as digits as its factorization.

10021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 10021021 is about 3165.5996272428. The cubic root of 10021021 is about 215.5943245867.

Adding to 10021021 its reverse (12012001), we get a palindrome (22033022).

The spelling of 10021021 in words is "ten million, twenty-one thousand, twenty-one".