1312618013821 has 8 divisors (see below), whose sum is σ = 1371922778880. Its totient is φ = 1253499450192.

The previous prime is 1312618013743. The next prime is 1312618013893. The reversal of 1312618013821 is 1283108162131.

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 1312618013821 - 2²⁹ = 1312081142909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312618053821) 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, 46535941 + ... + 46564138.

It is an arithmetic number, because the mean of its divisors is an integer number (171490347360).

Almost surely, 2^{1312618013821} is an apocalyptic number.

It is an amenable number.

1312618013821 is a deficient number, since it is larger than the sum of its proper divisors (59304765059).

1312618013821 is an equidigital number, since it uses as much as digits as its factorization.

1312618013821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93100715.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 1312618013821 in words is "one trillion, three hundred twelve billion, six hundred eighteen million, thirteen thousand, eight hundred twenty-one".