305020121 has 8 divisors (see below), whose sum is σ = 349179264. Its totient is φ = 261007200.

The previous prime is 305020099. The next prime is 305020153. The reversal of 305020121 is 121020503.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305020121 - 2¹⁰ = 305019097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 305020096 and 305020105.

It is not an unprimeable number, because it can be changed into a prime (305020021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32045 + ... + 40458.

It is an arithmetic number, because the mean of its divisors is an integer number (43647408).

Almost surely, 2^305020121 is an apocalyptic number.

It is an amenable number.

305020121 is a deficient number, since it is larger than the sum of its proper divisors (44159143).

305020121 is an equidigital number, since it uses as much as digits as its factorization.

305020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73111.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 305020121 is about 17464.8252496267. The cubic root of 305020121 is about 673.1463516742.

Adding to 305020121 its reverse (121020503), we get a palindrome (426040624).

It can be divided in two parts, 3050201 and 21, that multiplied together give a triangular number (64054221 = T₁₁₃₁₈).

The spelling of 305020121 in words is "three hundred five million, twenty thousand, one hundred twenty-one".