30303011021 has 4 divisors (see below), whose sum is σ = 30317519100. Its totient is φ = 30288502944.

The previous prime is 30303010951. The next prime is 30303011033. The reversal of 30303011021 is 12011030303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12011030303 = 67 ⋅179269109.

It can be written as a sum of positive squares in 2 ways, for example, as 16470898921 + 13832112100 = 128339^2 + 117610^2 .

It is a cyclic number.

It is not a de Polignac number, because 30303011021 - 2²⁶ = 30235902157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30303010987 and 30303011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30303011051) 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, 7250906 + ... + 7255083.

It is an arithmetic number, because the mean of its divisors is an integer number (7579379775).

Almost surely, 2^30303011021 is an apocalyptic number.

It is an amenable number.

30303011021 is a deficient number, since it is larger than the sum of its proper divisors (14508079).

30303011021 is a wasteful number, since it uses less digits than its factorization.

30303011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508078.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 30303011021 its reverse (12011030303), we get a palindrome (42314041324).

The spelling of 30303011021 in words is "thirty billion, three hundred three million, eleven thousand, twenty-one".