1312221198 has 8 divisors (see below), whose sum is σ = 2624442408. Its totient is φ = 437407064.

The previous prime is 1312221191. The next prime is 1312221199. The reversal of 1312221198 is 8911222131.

It is a sphenic number, since it is the product of 3 distinct primes.

1312221198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109351761 + ... + 109351772.

It is an arithmetic number, because the mean of its divisors is an integer number (328055301).

Almost surely, 2^1312221198 is an apocalyptic number.

1312221198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1312221198 is a wasteful number, since it uses less digits than its factorization.

1312221198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218703538.

The product of its digits is 1728, while the sum is 30.

The square root of 1312221198 is about 36224.5938279506. The cubic root of 1312221198 is about 1094.8022544855.

The spelling of 1312221198 in words is "one billion, three hundred twelve million, two hundred twenty-one thousand, one hundred ninety-eight".