11020521 has 4 divisors (see below), whose sum is σ = 14694032. Its totient is φ = 7347012.

The previous prime is 11020507. The next prime is 11020523. The reversal of 11020521 is 12502011.

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 not a de Polignac number, because 11020521 - 2⁷ = 11020393 is a prime.

It is a super-2 number, since 2×11020521² = 242903766222882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020497 and 11020506.

It is not an unprimeable number, because it can be changed into a prime (11020523) 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, 1836751 + ... + 1836756.

It is an arithmetic number, because the mean of its divisors is an integer number (3673508).

Almost surely, 2^11020521 is an apocalyptic number.

It is an amenable number.

11020521 is a deficient number, since it is larger than the sum of its proper divisors (3673511).

11020521 is an equidigital number, since it uses as much as digits as its factorization.

11020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673510.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 11020521 is about 3319.7170060112. The cubic root of 11020521 is about 222.5362210106.

Adding to 11020521 its reverse (12502011), we get a palindrome (23522532).

The spelling of 11020521 in words is "eleven million, twenty thousand, five hundred twenty-one".