30120243431 has 2 divisors, whose sum is σ = 30120243432. Its totient is φ = 30120243430.

The previous prime is 30120243427. The next prime is 30120243473. The reversal of 30120243431 is 13434202103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30120243431 - 2² = 30120243427 is a prime.

It is a super-2 number, since 2×30120243431² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 30120243397 and 30120243406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30120243631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060121715 + 15060121716.

It is an arithmetic number, because the mean of its divisors is an integer number (15060121716).

Almost surely, 2^30120243431 is an apocalyptic number.

30120243431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30120243431 is an equidigital number, since it uses as much as digits as its factorization.

30120243431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 30120243431 its reverse (13434202103), we get a palindrome (43554445534).

The spelling of 30120243431 in words is "thirty billion, one hundred twenty million, two hundred forty-three thousand, four hundred thirty-one".