11221410521 has 4 divisors (see below), whose sum is σ = 11221631412. Its totient is φ = 11221189632.

The previous prime is 11221410493. The next prime is 11221410547. The reversal of 11221410521 is 12501412211.

11221410521 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, and also an emirpimes, since its reverse is a distinct semiprime: 12501412211 = 62929 ⋅198659.

It can be written as a sum of positive squares in 2 ways, for example, as 4755481600 + 6465928921 = 68960^2 + 80411^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221410521 - 2⁶ = 11221410457 is a prime.

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 = 11221410493 and 11221410502.

It is not an unprimeable number, because it can be changed into a prime (11221415521) 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, 8345 + ... + 150041.

It is an arithmetic number, because the mean of its divisors is an integer number (2805407853).

Almost surely, 2^11221410521 is an apocalyptic number.

It is an amenable number.

11221410521 is a deficient number, since it is larger than the sum of its proper divisors (220891).

11221410521 is an equidigital number, since it uses as much as digits as its factorization.

11221410521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220890.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 11221410521 its reverse (12501412211), we get a palindrome (23722822732).

The spelling of 11221410521 in words is "eleven billion, two hundred twenty-one million, four hundred ten thousand, five hundred twenty-one".