1312303012200 has 72 divisors (see below), whose sum is σ = 4407150955350. Its totient is φ = 349947469440.

The previous prime is 1312303012157. The next prime is 1312303012213. The reversal of 1312303012200 is 22103032131.

1312303012200 is a `hidden beast` number, since 1 + 312 + 30 + 301 + 2 + 20 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 589575194244 + 722727817956 = 767838^2 + 850134^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 17 ways as a sum of consecutive naturals, for example, 364526815 + ... + 364530414.

Almost surely, 2^{1312303012200} is an apocalyptic number.

1312303012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312303012200 is an abundant number, since it is smaller than the sum of its proper divisors (3094847943150).

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

1312303012200 is a wasteful number, since it uses less digits than its factorization.

1312303012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729057251 (or 729057239 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1312303012200 its reverse (22103032131), we get a palindrome (1334406044331).

The spelling of 1312303012200 in words is "one trillion, three hundred twelve billion, three hundred three million, twelve thousand, two hundred".