121121000120221 has 2 divisors, whose sum is σ = 121121000120222. Its totient is φ = 121121000120220.

The previous prime is 121121000120149. The next prime is 121121000120243. The reversal of 121121000120221 is 122021000121121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115464265884900 + 5656734235321 = 10745430^2 + 2378389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121000120221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121121000120195 and 121121000120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121000120291) 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 as a sum of consecutive naturals, namely, 60560500060110 + 60560500060111.

It is an arithmetic number, because the mean of its divisors is an integer number (60560500060111).

Almost surely, 2^{121121000120221} is an apocalyptic number.

It is an amenable number.

121121000120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121000120221 is an equidigital number, since it uses as much as digits as its factorization.

121121000120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121121000120221 its reverse (122021000121121), we get a palindrome (243142000241342).

The spelling of 121121000120221 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty thousand, two hundred twenty-one".