121220303 has 2 divisors, whose sum is σ = 121220304. Its totient is φ = 121220302.

The previous prime is 121220293. The next prime is 121220321. The reversal of 121220303 is 303022121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220303 - 2⁴ = 121220287 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220383) 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, 60610151 + 60610152.

It is an arithmetic number, because the mean of its divisors is an integer number (60610152).

Almost surely, 2^121220303 is an apocalyptic number.

121220303 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220303 is an equidigital number, since it uses as much as digits as its factorization.

121220303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121220303 is about 11010.0092188881. The cubic root of 121220303 is about 494.9087380643.

Adding to 121220303 its reverse (303022121), we get a palindrome (424242424).

The spelling of 121220303 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred three".