1220444240500 has 96 divisors (see below), whose sum is σ = 2710153555200. Its totient is φ = 480026736000.

The previous prime is 1220444240443. The next prime is 1220444240503. The reversal of 1220444240500 is 50424440221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220444240503) 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 31 ways as a sum of consecutive naturals, for example, 13409146 + ... + 13499854.

It is an arithmetic number, because the mean of its divisors is an integer number (28230766200).

Almost surely, 2^{1220444240500} is an apocalyptic number.

1220444240500 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 1220444240500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355076777600).

1220444240500 is an abundant number, since it is smaller than the sum of its proper divisors (1489709314700).

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

1220444240500 is a wasteful number, since it uses less digits than its factorization.

1220444240500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91178 (or 91166 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 1220444240500 its reverse (50424440221), we get a palindrome (1270868680721).

The spelling of 1220444240500 in words is "one trillion, two hundred twenty billion, four hundred forty-four million, two hundred forty thousand, five hundred".