30011131021 has 2 divisors, whose sum is σ = 30011131022. Its totient is φ = 30011131020.

The previous prime is 30011131019. The next prime is 30011131079. The reversal of 30011131021 is 12013111003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20212308900 + 9798822121 = 142170^2 + 98989^2 .

It is a cyclic number.

It is not a de Polignac number, because 30011131021 - 2¹ = 30011131019 is a prime.

Together with 30011131019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 30011130992 and 30011131010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30011137021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15005565510 + 15005565511.

It is an arithmetic number, because the mean of its divisors is an integer number (15005565511).

Almost surely, 2^30011131021 is an apocalyptic number.

It is an amenable number.

30011131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30011131021 is an equidigital number, since it uses as much as digits as its factorization.

30011131021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 30011131021 its reverse (12013111003), we get a palindrome (42024242024).

The spelling of 30011131021 in words is "thirty billion, eleven million, one hundred thirty-one thousand, twenty-one".