1312231163641 has 4 divisors (see below), whose sum is σ = 1312467309412. Its totient is φ = 1311995017872.

The previous prime is 1312231163611. The next prime is 1312231163693. The reversal of 1312231163641 is 1463611322131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1176836602041 + 135394561600 = 1084821^2 + 367960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312231163641 is a prime.

It is a super-2 number, since 2×1312231163641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312231163597 and 1312231163606.

It is not an unprimeable number, because it can be changed into a prime (1312231163611) 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 3 ways as a sum of consecutive naturals, for example, 118064550 + ... + 118075663.

It is an arithmetic number, because the mean of its divisors is an integer number (328116827353).

Almost surely, 2^{1312231163641} is an apocalyptic number.

It is an amenable number.

1312231163641 is a deficient number, since it is larger than the sum of its proper divisors (236145771).

1312231163641 is an equidigital number, since it uses as much as digits as its factorization.

1312231163641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236145770.

The product of its digits is 15552, while the sum is 34.

Adding to 1312231163641 its reverse (1463611322131), we get a palindrome (2775842485772).

The spelling of 1312231163641 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, one hundred sixty-three thousand, six hundred forty-one".