30120112021 has 2 divisors, whose sum is σ = 30120112022. Its totient is φ = 30120112020.

The previous prime is 30120111907. The next prime is 30120112051. The reversal of 30120112021 is 12021102103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27278155921 + 2841956100 = 165161^2 + 53310^2 .

It is an emirp because it is prime and its reverse (12021102103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30120112021 - 2⁹ = 30120111509 is a prime.

It is a super-2 number, since 2×30120112021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30120111992 and 30120112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30120112051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060056010 + 15060056011.

It is an arithmetic number, because the mean of its divisors is an integer number (15060056011).

Almost surely, 2^30120112021 is an apocalyptic number.

It is an amenable number.

30120112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30120112021 is an equidigital number, since it uses as much as digits as its factorization.

30120112021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 30120112021 its reverse (12021102103), we get a palindrome (42141214124).

The spelling of 30120112021 in words is "thirty billion, one hundred twenty million, one hundred twelve thousand, twenty-one".