1312201221222 has 8 divisors (see below), whose sum is σ = 2624402442456. Its totient is φ = 437400407072.

The previous prime is 1312201221197. The next prime is 1312201221229. The reversal of 1312201221222 is 2221221022131.

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

1312201221222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312201221229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109350101763 + ... + 109350101774.

It is an arithmetic number, because the mean of its divisors is an integer number (328050305307).

Almost surely, 2^{1312201221222} is an apocalyptic number.

1312201221222 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.

1312201221222 is a wasteful number, since it uses less digits than its factorization.

1312201221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218700203542.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1312201221222 its reverse (2221221022131), we get a palindrome (3533422243353).

The spelling of 1312201221222 in words is "one trillion, three hundred twelve billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-two".