30444031421 has 2 divisors, whose sum is σ = 30444031422. Its totient is φ = 30444031420.

The previous prime is 30444031381. The next prime is 30444031459. The reversal of 30444031421 is 12413044403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30227647321 + 216384100 = 173861^2 + 14710^2 .

It is an emirp because it is prime and its reverse (12413044403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30444031421 - 2¹⁸ = 30443769277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30444039421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15222015710 + 15222015711.

It is an arithmetic number, because the mean of its divisors is an integer number (15222015711).

Almost surely, 2^30444031421 is an apocalyptic number.

It is an amenable number.

30444031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

30444031421 is an equidigital number, since it uses as much as digits as its factorization.

30444031421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 30444031421 its reverse (12413044403), we get a palindrome (42857075824).

The spelling of 30444031421 in words is "thirty billion, four hundred forty-four million, thirty-one thousand, four hundred twenty-one".