1313121212121 has 4 divisors (see below), whose sum is σ = 1750828282832. Its totient is φ = 875414141412.

The previous prime is 1313121212119. The next prime is 1313121212173. The reversal of 1313121212121 is 1212121213131.

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 1313121212121 - 2¹ = 1313121212119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313121212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218853535351 + ... + 218853535356.

It is an arithmetic number, because the mean of its divisors is an integer number (437707070708).

Almost surely, 2^{1313121212121} is an apocalyptic number.

It is an amenable number.

1313121212121 is a deficient number, since it is larger than the sum of its proper divisors (437707070711).

1313121212121 is an equidigital number, since it uses as much as digits as its factorization.

1313121212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437707070710.

The product of its digits is 144, while the sum is 21.

Adding to 1313121212121 its reverse (1212121213131), we get a palindrome (2525242425252).

The spelling of 1313121212121 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".