2003121222321 has 4 divisors (see below), whose sum is σ = 2670828296432. Its totient is φ = 1335414148212.

The previous prime is 2003121222317. The next prime is 2003121222379. The reversal of 2003121222321 is 1232221213002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2003121222321 - 2² = 2003121222317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2003121222391) 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, 333853537051 + ... + 333853537056.

It is an arithmetic number, because the mean of its divisors is an integer number (667707074108).

Almost surely, 2^{2003121222321} is an apocalyptic number.

It is an amenable number.

2003121222321 is a deficient number, since it is larger than the sum of its proper divisors (667707074111).

2003121222321 is an equidigital number, since it uses as much as digits as its factorization.

2003121222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667707074110.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2003121222321 its reverse (1232221213002), we get a palindrome (3235342435323).

The spelling of 2003121222321 in words is "two trillion, three billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred twenty-one".