1220344404225 has 24 divisors (see below), whose sum is σ = 2087209743360. Its totient is φ = 628407232320.

The previous prime is 1220344404221. The next prime is 1220344404241. The reversal of 1220344404225 is 5224044430221.

It is not a de Polignac number, because 1220344404225 - 2² = 1220344404221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220344404221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280536769 + ... + 280541118.

It is an arithmetic number, because the mean of its divisors is an integer number (86967072640).

Almost surely, 2^{1220344404225} is an apocalyptic number.

1220344404225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220344404225 is a deficient number, since it is larger than the sum of its proper divisors (866865339135).

1220344404225 is a wasteful number, since it uses less digits than its factorization.

1220344404225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561077929 (or 561077924 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 1220344404225 its reverse (5224044430221), we get a palindrome (6444388834446).

The spelling of 1220344404225 in words is "one trillion, two hundred twenty billion, three hundred forty-four million, four hundred four thousand, two hundred twenty-five".