30135443621 has 2 divisors, whose sum is σ = 30135443622. Its totient is φ = 30135443620.

The previous prime is 30135443609. The next prime is 30135443627. The reversal of 30135443621 is 12634453103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29319712900 + 815730721 = 171230^2 + 28561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30135443621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30135443627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15067721810 + 15067721811.

It is an arithmetic number, because the mean of its divisors is an integer number (15067721811).

Almost surely, 2^30135443621 is an apocalyptic number.

It is an amenable number.

30135443621 is a deficient number, since it is larger than the sum of its proper divisors (1).

30135443621 is an equidigital number, since it uses as much as digits as its factorization.

30135443621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 30135443621 its reverse (12634453103), we get a palindrome (42769896724).

The spelling of 30135443621 in words is "thirty billion, one hundred thirty-five million, four hundred forty-three thousand, six hundred twenty-one".