1101220225 has 24 divisors (see below), whose sum is σ = 1564397888. Its totient is φ = 753278400.

The previous prime is 1101220193. The next prime is 1101220247. The reversal of 1101220225 is 5220221011.

It is a happy number.

It is not a de Polignac number, because 1101220225 - 2⁵ = 1101220193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101220199 and 1101220208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66202 + ... + 81148.

Almost surely, 2^1101220225 is an apocalyptic number.

It is an amenable number.

1101220225 is a deficient number, since it is larger than the sum of its proper divisors (463177663).

1101220225 is a wasteful number, since it uses less digits than its factorization.

1101220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15385 (or 15380 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1101220225 is about 33184.6383888690. The cubic root of 1101220225 is about 1032.6616756168.

Adding to 1101220225 its reverse (5220221011), we get a palindrome (6321441236).

The spelling of 1101220225 in words is "one billion, one hundred one million, two hundred twenty thousand, two hundred twenty-five".