30312124321 has 4 divisors (see below), whose sum is σ = 30825889200. Its totient is φ = 29798359444.

The previous prime is 30312124309. The next prime is 30312124333. The reversal of 30312124321 is 12342121303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12342121303 = 14251 ⋅866053.

It is an interprime number because it is at equal distance from previous prime (30312124309) and next prime (30312124333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312124321 is a prime.

It is a super-2 number, since 2×30312124321² (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 = 30312124292 and 30312124301.

It is not an unprimeable number, because it can be changed into a prime (30312124351) 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, 256882351 + ... + 256882468.

It is an arithmetic number, because the mean of its divisors is an integer number (7706472300).

Almost surely, 2^30312124321 is an apocalyptic number.

It is an amenable number.

30312124321 is a deficient number, since it is larger than the sum of its proper divisors (513764879).

30312124321 is an equidigital number, since it uses as much as digits as its factorization.

30312124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513764878.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 30312124321 its reverse (12342121303), we get a palindrome (42654245624).

The spelling of 30312124321 in words is "thirty billion, three hundred twelve million, one hundred twenty-four thousand, three hundred twenty-one".