1213323131323 has 4 divisors (see below), whose sum is σ = 1214729068608. Its totient is φ = 1211917194040.

The previous prime is 1213323131303. The next prime is 1213323131353. The reversal of 1213323131323 is 3231313233121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213323131323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213323131291 and 1213323131300.

It is not an unprimeable number, because it can be changed into a prime (1213323131303) 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, 702967348 + ... + 702969073.

It is an arithmetic number, because the mean of its divisors is an integer number (303682267152).

Almost surely, 2^{1213323131323} is an apocalyptic number.

1213323131323 is a deficient number, since it is larger than the sum of its proper divisors (1405937285).

1213323131323 is an equidigital number, since it uses as much as digits as its factorization.

1213323131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405937284.

The product of its digits is 5832, while the sum is 28.

Adding to 1213323131323 its reverse (3231313233121), we get a palindrome (4444636364444).

The spelling of 1213323131323 in words is "one trillion, two hundred thirteen billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-three".