1111111228 has 24 divisors (see below), whose sum is σ = 2106708912. Its totient is φ = 510714624.

The previous prime is 1111111213. The next prime is 1111111231. The reversal of 1111111228 is 8221111111.

It is a happy number.

It is a plaindrome in base 10.

It is a congruent 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, 187075 + ... + 192922.

It is an arithmetic number, because the mean of its divisors is an integer number (87779538).

Almost surely, 2^1111111228 is an apocalyptic number.

It is an amenable number.

1111111228 is a deficient number, since it is larger than the sum of its proper divisors (995597684).

1111111228 is a wasteful number, since it uses less digits than its factorization.

1111111228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380061 (or 380059 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

The square root of 1111111228 is about 33333.3350866666. The cubic root of 1111111228 is about 1035.7442049714.

Adding to 1111111228 its reverse (8221111111), we get a palindrome (9332222339).

The spelling of 1111111228 in words is "one billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-eight".