10011021 has 4 divisors (see below), whose sum is σ = 13348032. Its totient is φ = 6674012.

The previous prime is 10011017. The next prime is 10011037. The reversal of 10011021 is 12011001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12011001 = 3 ⋅4003667.

It is a cyclic number.

It is not a de Polignac number, because 10011021 - 2² = 10011017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668501 + ... + 1668506.

It is an arithmetic number, because the mean of its divisors is an integer number (3337008).

Almost surely, 2^10011021 is an apocalyptic number.

It is an amenable number.

10011021 is a deficient number, since it is larger than the sum of its proper divisors (3337011).

10011021 is an equidigital number, since it uses as much as digits as its factorization.

10011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337010.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 10011021 is about 3164.0197534149. The cubic root of 10011021 is about 215.5225866942.

Adding to 10011021 its reverse (12011001), we get a palindrome (22022022).

Multiplying 10011021 by its reverse (12011001), we get a palindrome (120242383242021).

The spelling of 10011021 in words is "ten million, eleven thousand, twenty-one".