1323012013216 has 24 divisors (see below), whose sum is σ = 2694496451220. Its totient is φ = 638695454208.

The previous prime is 1323012013177. The next prime is 1323012013217. The reversal of 1323012013216 is 6123102103231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1322969241616 + 42771600 = 1150204^2 + 6540^2 .

It is a super-2 number, since 2×1323012013216² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1323012013217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712828821 + ... + 712830676.

Almost surely, 2^{1323012013216} is an apocalyptic number.

1323012013216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1323012013216 is an abundant number, since it is smaller than the sum of its proper divisors (1371484438004).

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

1323012013216 is a wasteful number, since it uses less digits than its factorization.

1323012013216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425659536 (or 1425659528 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1323012013216 its reverse (6123102103231), we get a palindrome (7446114116447).

The spelling of 1323012013216 in words is "one trillion, three hundred twenty-three billion, twelve million, thirteen thousand, two hundred sixteen".