1312103230221 has 16 divisors (see below), whose sum is σ = 1999884020864. Its totient is φ = 749590041024.

The previous prime is 1312103230189. The next prime is 1312103230223. The reversal of 1312103230221 is 1220323012131.

It is not a de Polignac number, because 1312103230221 - 2⁵ = 1312103230189 is a prime.

It is a super-2 number, since 2×1312103230221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312103230223) 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 15 ways as a sum of consecutive naturals, for example, 7546726 + ... + 7718631.

It is an arithmetic number, because the mean of its divisors is an integer number (124992751304).

Almost surely, 2^{1312103230221} is an apocalyptic number.

It is an amenable number.

1312103230221 is a deficient number, since it is larger than the sum of its proper divisors (687780790643).

1312103230221 is a wasteful number, since it uses less digits than its factorization.

1312103230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15269460.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1312103230221 its reverse (1220323012131), we get a palindrome (2532426242352).

The spelling of 1312103230221 in words is "one trillion, three hundred twelve billion, one hundred three million, two hundred thirty thousand, two hundred twenty-one".