11020021 has 4 divisors (see below), whose sum is σ = 11288844. Its totient is φ = 10751200.

The previous prime is 11020003. The next prime is 11020039. The reversal of 11020021 is 12002011.

11020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (11020003) and next prime (11020039).

It can be written as a sum of positive squares in 2 ways, for example, as 1347921 + 9672100 = 1161^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020021 - 2⁵ = 11019989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11019986 and 11020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020001) 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, 134350 + ... + 134431.

It is an arithmetic number, because the mean of its divisors is an integer number (2822211).

Almost surely, 2^11020021 is an apocalyptic number.

It is an amenable number.

11020021 is a deficient number, since it is larger than the sum of its proper divisors (268823).

11020021 is an equidigital number, since it uses as much as digits as its factorization.

11020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268822.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 11020021 is about 3319.6416975330. The cubic root of 11020021 is about 222.5328554772.

Adding to 11020021 its reverse (12002011), we get a palindrome (23022032).

The spelling of 11020021 in words is "eleven million, twenty thousand, twenty-one".