1321331200198 has 4 divisors (see below), whose sum is σ = 1981996800300. Its totient is φ = 660665600098.

The previous prime is 1321331200171. The next prime is 1321331200213. The reversal of 1321331200198 is 8910021331231.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1321331200198² (a number of 25 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 330332800048 + ... + 330332800051.

It is an arithmetic number, because the mean of its divisors is an integer number (495499200075).

Almost surely, 2^{1321331200198} is an apocalyptic number.

1321331200198 is a deficient number, since it is larger than the sum of its proper divisors (660665600102).

1321331200198 is an equidigital number, since it uses as much as digits as its factorization.

1321331200198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660665600101.

The product of its (nonzero) digits is 7776, while the sum is 34.

It can be divided in two parts, 132133 and 1200198, that added together give a palindrome (1332331).

The spelling of 1321331200198 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred ninety-eight".