111112222225 has 27 divisors (see below), whose sum is σ = 138969388593. Its totient is φ = 88128440640.

The previous prime is 111112222211. The next prime is 111112222279. The reversal of 111112222225 is 522222211111.

The square root of 111112222225 is 333335.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 12759735681 + 98352486544 = 112959^2 + 313612^2 .

It is not a de Polignac number, because 111112222225 - 2⁹ = 111112221713 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 111112222196 and 111112222205.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 271667821 + ... + 271668229.

Almost surely, 2^111112222225 is an apocalyptic number.

111112222225 is the 333335-th square number.

111112222225 is the 166668-th centered octagonal number.

It is an amenable number.

111112222225 is a deficient number, since it is larger than the sum of its proper divisors (27857166368).

111112222225 is an frugal number, since it uses more digits than its factorization.

111112222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 577 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

Adding to 111112222225 its reverse (522222211111), we get a palindrome (633334433336).

The spelling of 111112222225 in words is "one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty-five".