121220200011221 has 8 divisors (see below), whose sum is σ = 121298957305344. Its totient is φ = 121141457644240.

The previous prime is 121220200011217. The next prime is 121220200011223. The reversal of 121220200011221 is 122110002022121.

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 121220200011221 - 2² = 121220200011217 is a prime.

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 121220200011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220200011223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12538100 + ... + 19991106.

It is an arithmetic number, because the mean of its divisors is an integer number (15162369663168).

Almost surely, 2^{121220200011221} is an apocalyptic number.

It is an amenable number.

121220200011221 is a deficient number, since it is larger than the sum of its proper divisors (78757294123).

121220200011221 is an equidigital number, since it uses as much as digits as its factorization.

121220200011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7463571.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220200011221 its reverse (122110002022121), we get a palindrome (243330202033342).

The spelling of 121220200011221 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred million, eleven thousand, two hundred twenty-one".