1313121212223 has 4 divisors (see below), whose sum is σ = 1750828282968. Its totient is φ = 875414141480.

The previous prime is 1313121212177. The next prime is 1313121212239. The reversal of 1313121212223 is 3222121213131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313121212223 - 2³² = 1308826244927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313121212193 and 1313121212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313121212323) 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, 218853535368 + ... + 218853535373.

It is an arithmetic number, because the mean of its divisors is an integer number (437707070742).

Almost surely, 2^{1313121212223} is an apocalyptic number.

1313121212223 is a deficient number, since it is larger than the sum of its proper divisors (437707070745).

1313121212223 is an equidigital number, since it uses as much as digits as its factorization.

1313121212223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437707070744.

The product of its digits is 864, while the sum is 24.

Adding to 1313121212223 its reverse (3222121213131), we get a palindrome (4535242425354).

The spelling of 1313121212223 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-three".