1003120211321 has 4 divisors (see below), whose sum is σ = 1004424659700. Its totient is φ = 1001815762944.

The previous prime is 1003120211311. The next prime is 1003120211329. The reversal of 1003120211321 is 1231120213001.

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 403098010000 + 600022201321 = 634900^2 + 774611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003120211321 - 2¹⁰ = 1003120210297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1003120211321.

It is not an unprimeable number, because it can be changed into a prime (1003120211329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652223036 + ... + 652224573.

It is an arithmetic number, because the mean of its divisors is an integer number (251106164925).

Almost surely, 2^{1003120211321} is an apocalyptic number.

It is an amenable number.

1003120211321 is a deficient number, since it is larger than the sum of its proper divisors (1304448379).

1003120211321 is an equidigital number, since it uses as much as digits as its factorization.

1003120211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304448378.

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

Adding to 1003120211321 its reverse (1231120213001), we get a palindrome (2234240424322).

The spelling of 1003120211321 in words is "one trillion, three billion, one hundred twenty million, two hundred eleven thousand, three hundred twenty-one".