121321103221 has 2 divisors, whose sum is σ = 121321103222. Its totient is φ = 121321103220.

The previous prime is 121321103203. The next prime is 121321103257. The reversal of 121321103221 is 122301123121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120509651025 + 811452196 = 347145^2 + 28486^2 .

It is a cyclic number.

It is not a de Polignac number, because 121321103221 - 2¹⁹ = 121320578933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121321103621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660551610 + 60660551611.

It is an arithmetic number, because the mean of its divisors is an integer number (60660551611).

Almost surely, 2^121321103221 is an apocalyptic number.

It is an amenable number.

121321103221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321103221 is an equidigital number, since it uses as much as digits as its factorization.

121321103221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121321103221 its reverse (122301123121), we get a palindrome (243622226342).

The spelling of 121321103221 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred three thousand, two hundred twenty-one".