1312222200 has 48 divisors (see below), whose sum is σ = 4067890680. Its totient is φ = 349925760.

The previous prime is 1312222193. The next prime is 1312222217. The reversal of 1312222200 is 22222131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1312222200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1092919 + ... + 1094118.

Almost surely, 2^1312222200 is an apocalyptic number.

1312222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312222200 is an abundant number, since it is smaller than the sum of its proper divisors (2755668480).

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

1312222200 is a wasteful number, since it uses less digits than its factorization.

1312222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187056 (or 2187047 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1312222200 is about 36224.6076583308. The cubic root of 1312222200 is about 1094.8025331457.

Adding to 1312222200 its reverse (22222131), we get a palindrome (1334444331).

The spelling of 1312222200 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, two hundred".