1003221221100 has 144 divisors (see below), whose sum is σ = 3491914003200. Its totient is φ = 217238872320.

The previous prime is 1003221221089. The next prime is 1003221221113. The reversal of 1003221221100 is 11221223001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1003221221100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12531795 + ... + 12611594.

It is an arithmetic number, because the mean of its divisors is an integer number (24249402800).

Almost surely, 2^{1003221221100} is an apocalyptic number.

1003221221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003221221100 is an abundant number, since it is smaller than the sum of its proper divisors (2488692782100).

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

1003221221100 is a wasteful number, since it uses less digits than its factorization.

1003221221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25143432 (or 25143425 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1003221221100 its reverse (11221223001), we get a palindrome (1014442444101).

The spelling of 1003221221100 in words is "one trillion, three billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred".