11122221505 has 16 divisors (see below), whose sum is σ = 13508585424. Its totient is φ = 8790220800.

The previous prime is 11122221503. The next prime is 11122221529. The reversal of 11122221505 is 50512222111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3104272656 + 8017948849 = 55716^2 + 89543^2 .

It is not a de Polignac number, because 11122221505 - 2¹ = 11122221503 is a prime.

It is a super-2 number, since 2×11122221505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11122221503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206689 + ... + 254881.

It is an arithmetic number, because the mean of its divisors is an integer number (844286589).

Almost surely, 2^11122221505 is an apocalyptic number.

It is an amenable number.

11122221505 is a deficient number, since it is larger than the sum of its proper divisors (2386363919).

11122221505 is a wasteful number, since it uses less digits than its factorization.

11122221505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48756.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 11122221505 its reverse (50512222111), we get a palindrome (61634443616).

The spelling of 11122221505 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, five hundred five".