300021212121 has 24 divisors (see below), whose sum is σ = 418423530336. Its totient is φ = 191205094080.

The previous prime is 300021212093. The next prime is 300021212129. The reversal of 300021212121 is 121212120003.

It is not a de Polignac number, because 300021212121 - 2⁵ = 300021212089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 300021212121.

It is not an unprimeable number, because it can be changed into a prime (300021212129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2679541 + ... + 2789261.

It is an arithmetic number, because the mean of its divisors is an integer number (17434313764).

Almost surely, 2^300021212121 is an apocalyptic number.

It is an amenable number.

300021212121 is a deficient number, since it is larger than the sum of its proper divisors (118402318215).

300021212121 is a wasteful number, since it uses less digits than its factorization.

300021212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111493 (or 111470 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 300021212121 its reverse (121212120003), we get a palindrome (421233332124).

The spelling of 300021212121 in words is "three hundred billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".