30211120021 has 2 divisors, whose sum is σ = 30211120022. Its totient is φ = 30211120020.

The previous prime is 30211120003. The next prime is 30211120061. The reversal of 30211120021 is 12002111203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15157056996 + 15054063025 = 123114^2 + 122695^2 .

It is an emirp because it is prime and its reverse (12002111203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30211120021 - 2¹³ = 30211111829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30211119983 and 30211120010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30211120061) 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, 15105560010 + 15105560011.

It is an arithmetic number, because the mean of its divisors is an integer number (15105560011).

Almost surely, 2^30211120021 is an apocalyptic number.

It is an amenable number.

30211120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30211120021 is an equidigital number, since it uses as much as digits as its factorization.

30211120021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 30211120021 its reverse (12002111203), we get a palindrome (42213231224).

The spelling of 30211120021 in words is "thirty billion, two hundred eleven million, one hundred twenty thousand, twenty-one".