300121132121221 has 2 divisors, whose sum is σ = 300121132121222. Its totient is φ = 300121132121220.

The previous prime is 300121132121179. The next prime is 300121132121273. The reversal of 300121132121221 is 122121231121003.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260638583933025 + 39482548188196 = 16144305^2 + 6283514^2 .

It is a cyclic number.

It is not a de Polignac number, because 300121132121221 - 2¹⁷ = 300121131990149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 300121132121192 and 300121132121201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (300121132128221) 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, 150060566060610 + 150060566060611.

It is an arithmetic number, because the mean of its divisors is an integer number (150060566060611).

Almost surely, 2^{300121132121221} is an apocalyptic number.

It is an amenable number.

300121132121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

300121132121221 is an equidigital number, since it uses as much as digits as its factorization.

300121132121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 300121132121221 its reverse (122121231121003), we get a palindrome (422242363242224).

The spelling of 300121132121221 in words is "three hundred trillion, one hundred twenty-one billion, one hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".