1312103303221 has 4 divisors (see below), whose sum is σ = 1314612105472. Its totient is φ = 1309594500972.

The previous prime is 1312103303209. The next prime is 1312103303293. The reversal of 1312103303221 is 1223033012131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312103303221 - 2³³ = 1303513368629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312103303192 and 1312103303201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312103301221) 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, 1254400341 + ... + 1254401386.

It is an arithmetic number, because the mean of its divisors is an integer number (328653026368).

Almost surely, 2^{1312103303221} is an apocalyptic number.

It is an amenable number.

1312103303221 is a deficient number, since it is larger than the sum of its proper divisors (2508802251).

1312103303221 is an equidigital number, since it uses as much as digits as its factorization.

1312103303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508802250.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1312103303221 its reverse (1223033012131), we get a palindrome (2535136315352).

The spelling of 1312103303221 in words is "one trillion, three hundred twelve billion, one hundred three million, three hundred three thousand, two hundred twenty-one".