30221011021 has 2 divisors, whose sum is σ = 30221011022. Its totient is φ = 30221011020.

The previous prime is 30221011001. The next prime is 30221011033. The reversal of 30221011021 is 12011012203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29682121225 + 538889796 = 172285^2 + 23214^2 .

It is a cyclic number.

It is not a de Polignac number, because 30221011021 - 2⁷ = 30221010893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30221010992 and 30221011010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30221011001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110505510 + 15110505511.

It is an arithmetic number, because the mean of its divisors is an integer number (15110505511).

Almost surely, 2^30221011021 is an apocalyptic number.

It is an amenable number.

30221011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30221011021 is an equidigital number, since it uses as much as digits as its factorization.

30221011021 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 30221011021 its reverse (12011012203), we get a palindrome (42232023224).

The spelling of 30221011021 in words is "thirty billion, two hundred twenty-one million, eleven thousand, twenty-one".