11272021 has 4 divisors (see below), whose sum is σ = 11300812. Its totient is φ = 11243232.

The previous prime is 11271991. The next prime is 11272043. The reversal of 11272021 is 12027211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9696996 + 1575025 = 3114^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 11272021 - 2⁵ = 11271989 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 11271986 and 11272004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11272091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13800 + ... + 14593.

It is an arithmetic number, because the mean of its divisors is an integer number (2825203).

Almost surely, 2^11272021 is an apocalyptic number.

It is an amenable number.

11272021 is a deficient number, since it is larger than the sum of its proper divisors (28791).

11272021 is an equidigital number, since it uses as much as digits as its factorization.

11272021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28790.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 11272021 is about 3357.3830582762. The cubic root of 11272021 is about 224.2163420604.

Adding to 11272021 its reverse (12027211), we get a palindrome (23299232).

The spelling of 11272021 in words is "eleven million, two hundred seventy-two thousand, twenty-one".