11231021 has 4 divisors (see below), whose sum is σ = 11593344. Its totient is φ = 10868700.

The previous prime is 11230939. The next prime is 11231027. The reversal of 11231021 is 12013211.

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 11231021 - 2¹⁸ = 10968877 is a prime.

It is a super-2 number, since 2×11231021² = 252271665404882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11230993 and 11231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231027) 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, 181115 + ... + 181176.

It is an arithmetic number, because the mean of its divisors is an integer number (2898336).

Almost surely, 2^11231021 is an apocalyptic number.

It is an amenable number.

11231021 is a deficient number, since it is larger than the sum of its proper divisors (362323).

11231021 is an equidigital number, since it uses as much as digits as its factorization.

11231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362322.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 11231021 is about 3351.2715497256. The cubic root of 11231021 is about 223.9441625811.

Adding to 11231021 its reverse (12013211), we get a palindrome (23244232).

The spelling of 11231021 in words is "eleven million, two hundred thirty-one thousand, twenty-one".