1312223022112 has 96 divisors (see below), whose sum is σ = 2841883153200. Its totient is φ = 593662476288.

The previous prime is 1312223022109. The next prime is 1312223022113. The reversal of 1312223022112 is 2112203222131.

It can be written as a sum of positive squares in 8 ways, for example, as 557764010896 + 754459011216 = 746836^2 + 868596^2 .

It is not an unprimeable number, because it can be changed into a prime (1312223022113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3497314 + ... + 3854302.

Almost surely, 2^{1312223022112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312223022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420941576600).

1312223022112 is an abundant number, since it is smaller than the sum of its proper divisors (1529660131088).

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

1312223022112 is a wasteful number, since it uses less digits than its factorization.

1312223022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357278 (or 357270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1312223022112 its reverse (2112203222131), we get a palindrome (3424426244243).

The spelling of 1312223022112 in words is "one trillion, three hundred twelve billion, two hundred twenty-three million, twenty-two thousand, one hundred twelve".