30124204021 has 4 divisors (see below), whose sum is σ = 30135700044. Its totient is φ = 30112708000.

The previous prime is 30124203953. The next prime is 30124204043. The reversal of 30124204021 is 12040242103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12040242103 = 43223 ⋅278561.

It can be written as a sum of positive squares in 2 ways, for example, as 15389643025 + 14734560996 = 124055^2 + 121386^2 .

It is a cyclic number.

It is not a de Polignac number, because 30124204021 - 2²⁷ = 29989986293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30124204021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30124204421) 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, 5744080 + ... + 5749321.

It is an arithmetic number, because the mean of its divisors is an integer number (7533925011).

Almost surely, 2^30124204021 is an apocalyptic number.

It is an amenable number.

30124204021 is a deficient number, since it is larger than the sum of its proper divisors (11496023).

30124204021 is a wasteful number, since it uses less digits than its factorization.

30124204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496022.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 30124204021 its reverse (12040242103), we get a palindrome (42164446124).

The spelling of 30124204021 in words is "thirty billion, one hundred twenty-four million, two hundred four thousand, twenty-one".