30042100321 has 4 divisors (see below), whose sum is σ = 30379652100. Its totient is φ = 29704548544.

The previous prime is 30042100289. The next prime is 30042100337. The reversal of 30042100321 is 12300124003.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12300124003 = 29 ⋅424142207.

It can be written as a sum of positive squares in 2 ways, for example, as 13142100321 + 16900000000 = 114639^2 + 130000^2 .

It is a cyclic number.

It is not a de Polignac number, because 30042100321 - 2⁵ = 30042100289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30042100295 and 30042100304.

It is not an unprimeable number, because it can be changed into a prime (30042100381) 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, 168775756 + ... + 168775933.

It is an arithmetic number, because the mean of its divisors is an integer number (7594913025).

Almost surely, 2^30042100321 is an apocalyptic number.

It is an amenable number.

30042100321 is a deficient number, since it is larger than the sum of its proper divisors (337551779).

30042100321 is an equidigital number, since it uses as much as digits as its factorization.

30042100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337551778.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30042100321 its reverse (12300124003), we get a palindrome (42342224324).

The spelling of 30042100321 in words is "thirty billion, forty-two million, one hundred thousand, three hundred twenty-one".