1213313121331 has 8 divisors (see below), whose sum is σ = 1241566614464. Its totient is φ = 1185061305960.

The previous prime is 1213313121323. The next prime is 1213313121337. The reversal of 1213313121331 is 1331213133121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213313121331 - 2³ = 1213313121323 is a prime.

It is a super-2 number, since 2×1213313121331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213313121296 and 1213313121305.

It is not an unprimeable number, because it can be changed into a prime (1213313121337) 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 7 ways as a sum of consecutive naturals, for example, 1107736 + ... + 1911466.

It is an arithmetic number, because the mean of its divisors is an integer number (155195826808).

Almost surely, 2^{1213313121331} is an apocalyptic number.

1213313121331 is a deficient number, since it is larger than the sum of its proper divisors (28253493133).

1213313121331 is an equidigital number, since it uses as much as digits as its factorization.

1213313121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838881.

The product of its digits is 972, while the sum is 25.

Adding to 1213313121331 its reverse (1331213133121), we get a palindrome (2544526254452).

The spelling of 1213313121331 in words is "one trillion, two hundred thirteen billion, three hundred thirteen million, one hundred twenty-one thousand, three hundred thirty-one".