301232212121 has 2 divisors, whose sum is σ = 301232212122. Its totient is φ = 301232212120.

The previous prime is 301232212109. The next prime is 301232212139. The reversal of 301232212121 is 121212232103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182551962121 + 118680250000 = 427261^2 + 344500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-301232212121 is a prime.

It is a super-2 number, since 2×301232212121² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 301232212093 and 301232212102.

It is not a weakly prime, because it can be changed into another prime (301232212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150616106060 + 150616106061.

It is an arithmetic number, because the mean of its divisors is an integer number (150616106061).

Almost surely, 2^301232212121 is an apocalyptic number.

It is an amenable number.

301232212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

301232212121 is an equidigital number, since it uses as much as digits as its factorization.

301232212121 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 20.

Adding to 301232212121 its reverse (121212232103), we get a palindrome (422444444224).

The spelling of 301232212121 in words is "three hundred one billion, two hundred thirty-two million, two hundred twelve thousand, one hundred twenty-one".