11122221508 has 24 divisors (see below), whose sum is σ = 20997674712. Its totient is φ = 5135230464.

The previous prime is 11122221503. The next prime is 11122221529. The reversal of 11122221508 is 80512222111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2703792004 + 8418429504 = 51998^2 + 91752^2 .

It is a super-2 number, since 2×11122221508² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1539435 + ... + 1546642.

It is an arithmetic number, because the mean of its divisors is an integer number (874903113).

Almost surely, 2^11122221508 is an apocalyptic number.

It is an amenable number.

11122221508 is a deficient number, since it is larger than the sum of its proper divisors (9875453204).

11122221508 is a wasteful number, since it uses less digits than its factorization.

11122221508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086151 (or 3086149 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 11122221508 its reverse (80512222111), we get a palindrome (91634443619).

The spelling of 11122221508 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, five hundred eight".