1213103331313 has 8 divisors (see below), whose sum is σ = 1288514288232. Its totient is φ = 1138142589696.

The previous prime is 1213103331311. The next prime is 1213103331317. The reversal of 1213103331313 is 3131333013121.

It can be written as a sum of positive squares in 4 ways, for example, as 13526387809 + 1199576943504 = 116303^2 + 1095252^2 .

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 1213103331313 - 2¹ = 1213103331311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213103331311) 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, 112548270 + ... + 112559047.

It is an arithmetic number, because the mean of its divisors is an integer number (161064286029).

Almost surely, 2^{1213103331313} is an apocalyptic number.

It is an amenable number.

1213103331313 is a deficient number, since it is larger than the sum of its proper divisors (75410956919).

1213103331313 is a wasteful number, since it uses less digits than its factorization.

1213103331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225107651.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 1213103331313 its reverse (3131333013121), we get a palindrome (4344436344434).

The spelling of 1213103331313 in words is "one trillion, two hundred thirteen billion, one hundred three million, three hundred thirty-one thousand, three hundred thirteen".