1312311212200 has 384 divisors, whose sum is σ = 3274745760000. Its totient is φ = 488368742400.

The previous prime is 1312311212183. The next prime is 1312311212297. The reversal of 1312311212200 is 22121132131.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4219650045 + ... + 4219650355.

It is an arithmetic number, because the mean of its divisors is an integer number (8527983750).

Almost surely, 2^{1312311212200} is an apocalyptic number.

1312311212200 is a gapful number since it is divisible by the number (10) 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 1312311212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637372880000).

1312311212200 is an abundant number, since it is smaller than the sum of its proper divisors (1962434547800).

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

1312311212200 is a wasteful number, since it uses less digits than its factorization.

1312311212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1312311212200 its reverse (22121132131), we get a palindrome (1334432344331).

It can be divided in two parts, 131231 and 1212200, that added together give a palindrome (1343431).

The spelling of 1312311212200 in words is "one trillion, three hundred twelve billion, three hundred eleven million, two hundred twelve thousand, two hundred".