121321211103221 has 16 divisors (see below), whose sum is σ = 123182056800000. Its totient is φ = 119478723946176.

The previous prime is 121321211103199. The next prime is 121321211103229. The reversal of 121321211103221 is 122301112123121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321211103221 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 (121321211103229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716390 + ... + 15593448.

It is an arithmetic number, because the mean of its divisors is an integer number (7698878550000).

Almost surely, 2^{121321211103221} is an apocalyptic number.

It is an amenable number.

121321211103221 is a deficient number, since it is larger than the sum of its proper divisors (1860845696779).

121321211103221 is a wasteful number, since it uses less digits than its factorization.

121321211103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14877676.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121321211103221 its reverse (122301112123121), we get a palindrome (243622323226342).

The spelling of 121321211103221 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred eleven million, one hundred three thousand, two hundred twenty-one".