1225004440000 has 280 divisors, whose sum is σ = 3368157232176. Its totient is φ = 438144000000.

The previous prime is 1225004439991. The next prime is 1225004440001. The reversal of 1225004440000 is 444005221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225004440001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26817180 + ... + 26862820.

Almost surely, 2^{1225004440000} is an apocalyptic number.

1225004440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225004440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684078616088).

1225004440000 is an abundant number, since it is smaller than the sum of its proper divisors (2143152792176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225004440000 is an equidigital number, since it uses as much as digits as its factorization.

1225004440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45745 (or 45720 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 1225004440000 its reverse (444005221), we get a palindrome (1225448445221).

The spelling of 1225004440000 in words is "one trillion, two hundred twenty-five billion, four million, four hundred forty thousand".