1111131228 has 48 divisors (see below), whose sum is σ = 2633420160. Its totient is φ = 364595904.

The previous prime is 1111131211. The next prime is 1111131253. The reversal of 1111131228 is 8221311111.

It is a super-2 number, since 2×1111131228² = 2469225211673575968, which contains 22 as substring.

It is a congruent number.

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, 206638 + ... + 211946.

It is an arithmetic number, because the mean of its divisors is an integer number (54862920).

Almost surely, 2^1111131228 is an apocalyptic number.

It is an amenable number.

1111131228 is an abundant number, since it is smaller than the sum of its proper divisors (1522288932).

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

1111131228 is a wasteful number, since it uses less digits than its factorization.

1111131228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5586 (or 5584 counting only the distinct ones).

The product of its digits is 96, while the sum is 21.

The square root of 1111131228 is about 33333.6350853009. The cubic root of 1111131228 is about 1035.7504193987.

Adding to 1111131228 its reverse (8221311111), we get a palindrome (9332442339).

The spelling of 1111131228 in words is "one billion, one hundred eleven million, one hundred thirty-one thousand, two hundred twenty-eight".