30142030021 has 2 divisors, whose sum is σ = 30142030022. Its totient is φ = 30142030020.

The previous prime is 30142030003. The next prime is 30142030031. The reversal of 30142030021 is 12003024103.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26394876225 + 3747153796 = 162465^2 + 61214^2 .

It is a cyclic number.

It is not a de Polignac number, because 30142030021 - 2⁷ = 30142029893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30142029977 and 30142030004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30142030031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15071015010 + 15071015011.

It is an arithmetic number, because the mean of its divisors is an integer number (15071015011).

Almost surely, 2^30142030021 is an apocalyptic number.

It is an amenable number.

30142030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30142030021 is an equidigital number, since it uses as much as digits as its factorization.

30142030021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 30142030021 its reverse (12003024103), we get a palindrome (42145054124).

The spelling of 30142030021 in words is "thirty billion, one hundred forty-two million, thirty thousand, twenty-one".