121101122322221 has 2 divisors, whose sum is σ = 121101122322222. Its totient is φ = 121101122322220.

The previous prime is 121101122322211. The next prime is 121101122322233. The reversal of 121101122322221 is 122223221101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121099328376196 + 1793946025 = 11004514^2 + 42355^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101122322221 - 2³⁰ = 121100048580397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101122322211) 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, 60550561161110 + 60550561161111.

It is an arithmetic number, because the mean of its divisors is an integer number (60550561161111).

Almost surely, 2^{121101122322221} is an apocalyptic number.

It is an amenable number.

121101122322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101122322221 is an equidigital number, since it uses as much as digits as its factorization.

121101122322221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 121101122322221 its reverse (122223221101121), we get a palindrome (243324343423342).

The spelling of 121101122322221 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred twenty-two million, three hundred twenty-two thousand, two hundred twenty-one".