1211221201199 has 8 divisors (see below), whose sum is σ = 1213383762720. Its totient is φ = 1209060556000.

The previous prime is 1211221201129. The next prime is 1211221201207. The reversal of 1211221201199 is 9911021221121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211221201199 - 2¹² = 1211221197103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211221201109) 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 7 ways as a sum of consecutive naturals, for example, 789149 + ... + 1745049.

It is an arithmetic number, because the mean of its divisors is an integer number (151672970340).

Almost surely, 2^{1211221201199} is an apocalyptic number.

1211221201199 is a deficient number, since it is larger than the sum of its proper divisors (2162561521).

1211221201199 is a wasteful number, since it uses less digits than its factorization.

1211221201199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958161.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 1211221201199 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred ninety-nine".