30300100021 has 4 divisors (see below), whose sum is σ = 30578082700. Its totient is φ = 30022117344.

The previous prime is 30300100007. The next prime is 30300100057. The reversal of 30300100021 is 12000100303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12000100303 = 19531 ⋅614413.

It can be written as a sum of positive squares in 2 ways, for example, as 14244422500 + 16055677521 = 119350^2 + 126711^2 .

It is a cyclic number.

It is not a de Polignac number, because 30300100021 - 2⁹ = 30300099509 is a prime.

It is a super-2 number, since 2×30300100021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30300099980 and 30300100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30300100921) 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, 138991176 + ... + 138991393.

It is an arithmetic number, because the mean of its divisors is an integer number (7644520675).

Almost surely, 2^30300100021 is an apocalyptic number.

It is an amenable number.

30300100021 is a deficient number, since it is larger than the sum of its proper divisors (277982679).

30300100021 is a wasteful number, since it uses less digits than its factorization.

30300100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277982678.

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 30300100021 its reverse (12000100303), we get a palindrome (42300200324).

It can be divided in two parts, 30300 and 100021, that added together give a 4-th power (130321 = 19⁴).

The spelling of 30300100021 in words is "thirty billion, three hundred million, one hundred thousand, twenty-one".