1216381324313 has 8 divisors (see below), whose sum is σ = 1277106487680. Its totient is φ = 1156908226320.

The previous prime is 1216381324307. The next prime is 1216381324369. The reversal of 1216381324313 is 3134231836121.

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

It is not a de Polignac number, because 1216381324313 - 2⁴ = 1216381324297 is a prime.

It is a super-2 number, since 2×1216381324313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216381324303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313014353 + ... + 313018238.

It is an arithmetic number, because the mean of its divisors is an integer number (159638310960).

Almost surely, 2^{1216381324313} is an apocalyptic number.

It is an amenable number.

1216381324313 is a deficient number, since it is larger than the sum of its proper divisors (60725163367).

1216381324313 is an equidigital number, since it uses as much as digits as its factorization.

1216381324313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626032687.

The product of its digits is 62208, while the sum is 38.

The spelling of 1216381324313 in words is "one trillion, two hundred sixteen billion, three hundred eighty-one million, three hundred twenty-four thousand, three hundred thirteen".