1312331223444 has 24 divisors (see below), whose sum is σ = 3067218235200. Its totient is φ = 436713448704.

The previous prime is 1312331223443. The next prime is 1312331223523. The reversal of 1312331223444 is 4443221332131.

It is a super-2 number, since 2×1312331223444² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312331223443) 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, 91279069 + ... + 91293444.

It is an arithmetic number, because the mean of its divisors is an integer number (127800759800).

Almost surely, 2^{1312331223444} is an apocalyptic number.

It is an amenable number.

1312331223444 is an abundant number, since it is smaller than the sum of its proper divisors (1754887011756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312331223444 is a wasteful number, since it uses less digits than its factorization.

1312331223444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182573119 (or 182573117 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

Adding to 1312331223444 its reverse (4443221332131), we get a palindrome (5755552555575).

The spelling of 1312331223444 in words is "one trillion, three hundred twelve billion, three hundred thirty-one million, two hundred twenty-three thousand, four hundred forty-four".