305120011 has 12 divisors (see below), whose sum is σ = 366386880. Its totient is φ = 253093680.

The previous prime is 305119979. The next prime is 305120021. The reversal of 305120011 is 110021503.

It is not a de Polignac number, because 305120011 - 2⁵ = 305119979 is a prime.

It is a super-2 number, since 2×305120011² = 186196442225280242, 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 = 305119973 and 305120000.

It is not an unprimeable number, because it can be changed into a prime (305120021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98916 + ... + 101953.

It is an arithmetic number, because the mean of its divisors is an integer number (30532240).

Almost surely, 2^305120011 is an apocalyptic number.

305120011 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

305120011 is a deficient number, since it is larger than the sum of its proper divisors (61266869).

305120011 is a wasteful number, since it uses less digits than its factorization.

305120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200914 (or 200907 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 305120011 is about 17467.6847635856. The cubic root of 305120011 is about 673.2198257891.

Adding to 305120011 its reverse (110021503), we get a palindrome (415141514).

The spelling of 305120011 in words is "three hundred five million, one hundred twenty thousand, eleven".