1312221303200 has 72 divisors (see below), whose sum is σ = 3203936895852. Its totient is φ = 524810424320.

The previous prime is 1312221303181. The next prime is 1312221303221. The reversal of 1312221303200 is 23031222131.

It can be written as a sum of positive squares in 6 ways, for example, as 873484636816 + 438736666384 = 934604^2 + 662372^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5415032 + ... + 5652168.

Almost surely, 2^{1312221303200} is an apocalyptic number.

1312221303200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312221303200 is an abundant number, since it is smaller than the sum of its proper divisors (1891715592652).

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

1312221303200 is a wasteful number, since it uses less digits than its factorization.

1312221303200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244074 (or 244061 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1312221303200 its reverse (23031222131), we get a palindrome (1335252525331).

The spelling of 1312221303200 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, three hundred three thousand, two hundred".