1311212300 has 72 divisors (see below), whose sum is σ = 2892471120. Its totient is φ = 515872000.

The previous prime is 1311212299. The next prime is 1311212317. The reversal of 1311212300 is 32121131.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1989371 + ... + 1990029.

It is an arithmetic number, because the mean of its divisors is an integer number (40173210).

Almost surely, 2^1311212300 is an apocalyptic number.

1311212300 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 1311212300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446235560).

1311212300 is an abundant number, since it is smaller than the sum of its proper divisors (1581258820).

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

1311212300 is a wasteful number, since it uses less digits than its factorization.

1311212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1311212300 is about 36210.6655558828. The cubic root of 1311212300 is about 1094.5216038851.

Adding to 1311212300 its reverse (32121131), we get a palindrome (1343333431).

The spelling of 1311212300 in words is "one billion, three hundred eleven million, two hundred twelve thousand, three hundred".