1221120210199 has 8 divisors (see below), whose sum is σ = 1227490395120. Its totient is φ = 1214760796800.

The previous prime is 1221120210181. The next prime is 1221120210221. The reversal of 1221120210199 is 9910120211221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221120210199 is a prime.

It is a super-2 number, since 2×1221120210199² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221120210199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221120210109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2465509 + ... + 2919070.

It is an arithmetic number, because the mean of its divisors is an integer number (153436299390).

Almost surely, 2^{1221120210199} is an apocalyptic number.

1221120210199 is a deficient number, since it is larger than the sum of its proper divisors (6370184921).

1221120210199 is an equidigital number, since it uses as much as digits as its factorization.

1221120210199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385761.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 1221120210199 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one hundred ninety-nine".