1213003121313 has 4 divisors (see below), whose sum is σ = 1617337495088. Its totient is φ = 808668747540.

The previous prime is 1213003121287. The next prime is 1213003121347. The reversal of 1213003121313 is 3131213003121.

It is a happy number.

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 1213003121313 - 2¹⁰ = 1213003120289 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 1213003121313.

It is not an unprimeable number, because it can be changed into a prime (1213003141313) 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, 202167186883 + ... + 202167186888.

It is an arithmetic number, because the mean of its divisors is an integer number (404334373772).

Almost surely, 2^{1213003121313} is an apocalyptic number.

It is an amenable number.

1213003121313 is a deficient number, since it is larger than the sum of its proper divisors (404334373775).

1213003121313 is an equidigital number, since it uses as much as digits as its factorization.

1213003121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404334373774.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1213003121313 its reverse (3131213003121), we get a palindrome (4344216124434).

The spelling of 1213003121313 in words is "one trillion, two hundred thirteen billion, three million, one hundred twenty-one thousand, three hundred thirteen".