1312200021132 has 432 divisors, whose sum is σ = 4655602721952. Its totient is φ = 306108149760.

The previous prime is 1312200021107. The next prime is 1312200021151. The reversal of 1312200021132 is 2311200022131.

1312200021132 is a `hidden beast` number, since 1 + 312 + 200 + 0 + 21 + 132 = 666.

It is a super-2 number, since 2×1312200021132² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9263028 + ... + 9403620.

Almost surely, 2^{1312200021132} is an apocalyptic number.

1312200021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312200021132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2327801360976).

1312200021132 is an abundant number, since it is smaller than the sum of its proper divisors (3343402700820).

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

1312200021132 is a wasteful number, since it uses less digits than its factorization.

1312200021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140678 (or 140666 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1312200021132 its reverse (2311200022131), we get a palindrome (3623400043263).

Subtracting 1312200021132 from its reverse (2311200022131), we obtain a palindrome (999000000999).

The spelling of 1312200021132 in words is "one trillion, three hundred twelve billion, two hundred million, twenty-one thousand, one hundred thirty-two".