30124023521 has 4 divisors (see below), whose sum is σ = 30858755844. Its totient is φ = 29389291200.

The previous prime is 30124023493. The next prime is 30124023529. The reversal of 30124023521 is 12532042103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17385741025 + 12738282496 = 131855^2 + 112864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30124023521 is a prime.

It is a super-2 number, since 2×30124023521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30124023529) 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, 367366100 + ... + 367366181.

It is an arithmetic number, because the mean of its divisors is an integer number (7714688961).

Almost surely, 2^30124023521 is an apocalyptic number.

It is an amenable number.

30124023521 is a deficient number, since it is larger than the sum of its proper divisors (734732323).

30124023521 is an equidigital number, since it uses as much as digits as its factorization.

30124023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734732322.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 30124023521 its reverse (12532042103), we get a palindrome (42656065624).

The spelling of 30124023521 in words is "thirty billion, one hundred twenty-four million, twenty-three thousand, five hundred twenty-one".