1111222225 has 27 divisors (see below), whose sum is σ = 1414179793. Its totient is φ = 866176640.

The previous prime is 1111222223. The next prime is 1111222247. The reversal of 1111222225 is 5222221111.

It is a happy number.

The square root of 1111222225 is 33335.

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 565345729 + 545876496 = 23777^2 + 23364^2 .

It is not a de Polignac number, because 1111222225 - 2¹ = 1111222223 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1111222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9833769 + ... + 9833881.

Almost surely, 2^1111222225 is an apocalyptic number.

1111222225 is the 33335-th square number.

1111222225 is the 16668-th centered octagonal number.

It is an amenable number.

1111222225 is a deficient number, since it is larger than the sum of its proper divisors (302957568).

1111222225 is an frugal number, since it uses more digits than its factorization.

1111222225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 177 counting only the distinct ones).

The product of its digits is 160, while the sum is 19.

The cubic root of 1111222225 is about 1035.7786931692.

Adding to 1111222225 its reverse (5222221111), we get a palindrome (6333443336).

It can be divided in two parts, 11112 and 22225, that multiplied together give a triangular number (246964200 = T₂₂₂₂₄).

The spelling of 1111222225 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-five".