30012120031 has 2 divisors, whose sum is σ = 30012120032. Its totient is φ = 30012120030.

The previous prime is 30012120029. The next prime is 30012120037. The reversal of 30012120031 is 13002121003.

It is a weak prime.

It is an emirp because it is prime and its reverse (13002121003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30012120031 - 2¹ = 30012120029 is a prime.

It is a super-2 number, since 2×30012120031² (a number of 22 digits) contains 22 as substring.

Together with 30012120029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 30012119993 and 30012120020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30012120037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15006060015 + 15006060016.

It is an arithmetic number, because the mean of its divisors is an integer number (15006060016).

Almost surely, 2^30012120031 is an apocalyptic number.

30012120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

30012120031 is an equidigital number, since it uses as much as digits as its factorization.

30012120031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30012120031 its reverse (13002121003), we get a palindrome (43014241034).

The spelling of 30012120031 in words is "thirty billion, twelve million, one hundred twenty thousand, thirty-one".