30301211021 has 2 divisors, whose sum is σ = 30301211022. Its totient is φ = 30301211020.

The previous prime is 30301210993. The next prime is 30301211023. The reversal of 30301211021 is 12011210303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30176553796 + 124657225 = 173714^2 + 11165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30301211021 is a prime.

Together with 30301211023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30301210987 and 30301211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30301211023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15150605510 + 15150605511.

It is an arithmetic number, because the mean of its divisors is an integer number (15150605511).

Almost surely, 2^30301211021 is an apocalyptic number.

It is an amenable number.

30301211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30301211021 is an equidigital number, since it uses as much as digits as its factorization.

30301211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30301211021 its reverse (12011210303), we get a palindrome (42312421324).

The spelling of 30301211021 in words is "thirty billion, three hundred one million, two hundred eleven thousand, twenty-one".