1312100221331 has 8 divisors (see below), whose sum is σ = 1331723831184. Its totient is φ = 1292477788800.

The previous prime is 1312100221241. The next prime is 1312100221357. The reversal of 1312100221331 is 1331220012131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312100221331 is a prime.

It is a super-2 number, since 2×1312100221331² (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 (1312100220331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095271 + ... + 2648463.

It is an arithmetic number, because the mean of its divisors is an integer number (166465478898).

Almost surely, 2^{1312100221331} is an apocalyptic number.

1312100221331 is a deficient number, since it is larger than the sum of its proper divisors (19623609853).

1312100221331 is an equidigital number, since it uses as much as digits as its factorization.

1312100221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588661.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1312100221331 its reverse (1331220012131), we get a palindrome (2643320233462).

The spelling of 1312100221331 in words is "one trillion, three hundred twelve billion, one hundred million, two hundred twenty-one thousand, three hundred thirty-one".