30042442021 has 12 divisors (see below), whose sum is σ = 32020811244. Its totient is φ = 28179432000.

The previous prime is 30042441991. The next prime is 30042442069. The reversal of 30042442021 is 12024424003.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23069356996 + 6973085025 = 151886^2 + 83505^2 .

It is not a de Polignac number, because 30042442021 - 2³³ = 21452507429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30042441983 and 30042442001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30042442321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375520 + ... + 448441.

It is an arithmetic number, because the mean of its divisors is an integer number (2668400937).

Almost surely, 2^30042442021 is an apocalyptic number.

It is an amenable number.

30042442021 is a deficient number, since it is larger than the sum of its proper divisors (1978369223).

30042442021 is a wasteful number, since it uses less digits than its factorization.

30042442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824100 (or 824081 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 30042442021 its reverse (12024424003), we get a palindrome (42066866024).

The spelling of 30042442021 in words is "thirty billion, forty-two million, four hundred forty-two thousand, twenty-one".