11221022440 has 64 divisors (see below), whose sum is σ = 25510914000. Its totient is φ = 4441651200.

The previous prime is 11221022437. The next prime is 11221022471. The reversal of 11221022440 is 4422012211.

It can be written as a sum of positive squares in 8 ways, for example, as 1290102724 + 9930919716 = 35918^2 + 99654^2 .

It is a super-2 number, since 2×11221022440² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6229540 + ... + 6231340.

Almost surely, 2^11221022440 is an apocalyptic number.

11221022440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221022440 is an abundant number, since it is smaller than the sum of its proper divisors (14289891560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221022440 is a wasteful number, since it uses less digits than its factorization.

11221022440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 11221022440 its reverse (4422012211), we get a palindrome (15643034651).

The spelling of 11221022440 in words is "eleven billion, two hundred twenty-one million, twenty-two thousand, four hundred forty".