11012021 has 4 divisors (see below), whose sum is σ = 11018700. Its totient is φ = 11005344.

The previous prime is 11012017. The next prime is 11012033. The reversal of 11012021 is 12021011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12021011 = 617 ⋅19483.

It can be written as a sum of positive squares in 2 ways, for example, as 1020100 + 9991921 = 1010^2 + 3161^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012021 - 2² = 11012017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012011) 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 3 ways as a sum of consecutive naturals, for example, 1115 + ... + 4823.

It is an arithmetic number, because the mean of its divisors is an integer number (2754675).

Almost surely, 2^11012021 is an apocalyptic number.

It is an amenable number.

11012021 is a deficient number, since it is larger than the sum of its proper divisors (6679).

11012021 is an equidigital number, since it uses as much as digits as its factorization.

11012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11012021 is about 3318.4365294518. The cubic root of 11012021 is about 222.4789930931.

Adding to 11012021 its reverse (12021011), we get a palindrome (23033032).

The spelling of 11012021 in words is "eleven million, twelve thousand, twenty-one".