1320203111200 has 36 divisors (see below), whose sum is σ = 3222945847170. Its totient is φ = 528081244160.

The previous prime is 1320203111189. The next prime is 1320203111219. The reversal of 1320203111200 is 21113020231.

It can be written as a sum of positive squares in 3 ways, for example, as 709698414096 + 610504697104 = 842436^2 + 781348^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 825126145 + ... + 825127744.

Almost surely, 2^{1320203111200} is an apocalyptic number.

1320203111200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320203111200 is an abundant number, since it is smaller than the sum of its proper divisors (1902742735970).

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

1320203111200 is a wasteful number, since it uses less digits than its factorization.

1320203111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650253909 (or 1650253896 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1320203111200 its reverse (21113020231), we get a palindrome (1341316131431).

The spelling of 1320203111200 in words is "one trillion, three hundred twenty billion, two hundred three million, one hundred eleven thousand, two hundred".