11021205505 has 8 divisors (see below), whose sum is σ = 13274250624. Its totient is φ = 8784428400.

The previous prime is 11021205499. The next prime is 11021205521. The reversal of 11021205505 is 50550212011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11021205505 - 2⁵ = 11021205473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4065511 + ... + 4068220.

It is an arithmetic number, because the mean of its divisors is an integer number (1659281328).

Almost surely, 2^11021205505 is an apocalyptic number.

It is an amenable number.

11021205505 is a deficient number, since it is larger than the sum of its proper divisors (2253045119).

11021205505 is an equidigital number, since it uses as much as digits as its factorization.

11021205505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134007.

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 11021205505 its reverse (50550212011), we get a palindrome (61571417516).

The spelling of 11021205505 in words is "eleven billion, twenty-one million, two hundred five thousand, five hundred five".