30211123021 has 2 divisors, whose sum is σ = 30211123022. Its totient is φ = 30211123020.

The previous prime is 30211123009. The next prime is 30211123039. The reversal of 30211123021 is 12032111203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28320177796 + 1890945225 = 168286^2 + 43485^2 .

It is a cyclic number.

It is not a de Polignac number, because 30211123021 - 2⁵ = 30211122989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30211122986 and 30211123004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30211123121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15105561510 + 15105561511.

It is an arithmetic number, because the mean of its divisors is an integer number (15105561511).

Almost surely, 2^30211123021 is an apocalyptic number.

It is an amenable number.

30211123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30211123021 is an equidigital number, since it uses as much as digits as its factorization.

30211123021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30211123021 its reverse (12032111203), we get a palindrome (42243234224).

The spelling of 30211123021 in words is "thirty billion, two hundred eleven million, one hundred twenty-three thousand, twenty-one".