305212101 has 16 divisors (see below), whose sum is σ = 431467200. Its totient is φ = 191248128.

The previous prime is 305212091. The next prime is 305212109. The reversal of 305212101 is 101212503.

It is not a de Polignac number, because 305212101 - 2⁵ = 305212069 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305212109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38670 + ... + 45888.

It is an arithmetic number, because the mean of its divisors is an integer number (26966700).

Almost surely, 2^305212101 is an apocalyptic number.

It is an amenable number.

305212101 is a deficient number, since it is larger than the sum of its proper divisors (126255099).

305212101 is a wasteful number, since it uses less digits than its factorization.

305212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 305212101 is about 17470.3205751927. The cubic root of 305212101 is about 673.2875484068.

Adding to 305212101 its reverse (101212503), we get a palindrome (406424604).

The spelling of 305212101 in words is "three hundred five million, two hundred twelve thousand, one hundred one".