305422121 has 4 divisors (see below), whose sum is σ = 311920512. Its totient is φ = 298923732.

The previous prime is 305422111. The next prime is 305422123. The reversal of 305422121 is 121224503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121224503 = 19 ⋅6380237.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305422121 is a prime.

It is a super-2 number, since 2×305422121² = 186565343992277282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305422093 and 305422102.

It is not an unprimeable number, because it can be changed into a prime (305422123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3249125 + ... + 3249218.

It is an arithmetic number, because the mean of its divisors is an integer number (77980128).

Almost surely, 2^305422121 is an apocalyptic number.

It is an amenable number.

305422121 is a deficient number, since it is larger than the sum of its proper divisors (6498391).

305422121 is an equidigital number, since it uses as much as digits as its factorization.

305422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498390.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 305422121 is about 17476.3303070181. The cubic root of 305422121 is about 673.4419453316.

Adding to 305422121 its reverse (121224503), we get a palindrome (426646624).

The spelling of 305422121 in words is "three hundred five million, four hundred twenty-two thousand, one hundred twenty-one".