1003221355121 has 8 divisors (see below), whose sum is σ = 1010095871400. Its totient is φ = 996348725632.

The previous prime is 1003221355063. The next prime is 1003221355151. The reversal of 1003221355121 is 1215531223001.

It can be written as a sum of positive squares in 4 ways, for example, as 37058175025 + 966163180096 = 192505^2 + 982936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1003221355121 - 2²² = 1003217160817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003221355151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603731 + ... + 1539783.

It is an arithmetic number, because the mean of its divisors is an integer number (126261983925).

Almost surely, 2^{1003221355121} is an apocalyptic number.

It is an amenable number.

1003221355121 is a deficient number, since it is larger than the sum of its proper divisors (6874516279).

1003221355121 is an equidigital number, since it uses as much as digits as its factorization.

1003221355121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943395.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 1003221355121 its reverse (1215531223001), we get a palindrome (2218752578122).

The spelling of 1003221355121 in words is "one trillion, three billion, two hundred twenty-one million, three hundred fifty-five thousand, one hundred twenty-one".