10020921 has 8 divisors (see below), whose sum is σ = 13822080. Its totient is φ = 6450192.

The previous prime is 10020889. The next prime is 10020931. The reversal of 10020921 is 12902001.

It is a happy number.

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

It is not a de Polignac number, because 10020921 - 2⁵ = 10020889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10020921.

It is not an unprimeable number, because it can be changed into a prime (10020931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57505 + ... + 57678.

It is an arithmetic number, because the mean of its divisors is an integer number (1727760).

Almost surely, 2^10020921 is an apocalyptic number.

It is an amenable number.

10020921 is a deficient number, since it is larger than the sum of its proper divisors (3801159).

10020921 is a wasteful number, since it uses less digits than its factorization.

10020921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115215.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 10020921 is about 3165.5838324075. The cubic root of 10020921 is about 215.5936074441.

Adding to 10020921 its reverse (12902001), we get a palindrome (22922922).

The spelling of 10020921 in words is "ten million, twenty thousand, nine hundred twenty-one".