1003213120121 has 4 divisors (see below), whose sum is σ = 1003330148772. Its totient is φ = 1003096091472.

The previous prime is 1003213120093. The next prime is 1003213120193. The reversal of 1003213120121 is 1210213123001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544120146025 + 459092974096 = 737645^2 + 677564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1003213120121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1003213120121.

It is not an unprimeable number, because it can be changed into a prime (1003213126121) 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 3 ways as a sum of consecutive naturals, for example, 58501466 + ... + 58518611.

It is an arithmetic number, because the mean of its divisors is an integer number (250832537193).

Almost surely, 2^{1003213120121} is an apocalyptic number.

It is an amenable number.

1003213120121 is a deficient number, since it is larger than the sum of its proper divisors (117028651).

1003213120121 is an equidigital number, since it uses as much as digits as its factorization.

1003213120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117028650.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1003213120121 its reverse (1210213123001), we get a palindrome (2213426243122).

The spelling of 1003213120121 in words is "one trillion, three billion, two hundred thirteen million, one hundred twenty thousand, one hundred twenty-one".