30221021293 has 4 divisors (see below), whose sum is σ = 30560583420. Its totient is φ = 29881459168.

The previous prime is 30221021287. The next prime is 30221021339. The reversal of 30221021293 is 39212012203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16895320324 + 13325700969 = 129982^2 + 115437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221021293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221021213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169780930 + ... + 169781107.

It is an arithmetic number, because the mean of its divisors is an integer number (7640145855).

Almost surely, 2^30221021293 is an apocalyptic number.

It is an amenable number.

30221021293 is a deficient number, since it is larger than the sum of its proper divisors (339562127).

30221021293 is an equidigital number, since it uses as much as digits as its factorization.

30221021293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339562126.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 30221021293 its reverse (39212012203), we get a palindrome (69433033496).

The spelling of 30221021293 in words is "thirty billion, two hundred twenty-one million, twenty-one thousand, two hundred ninety-three".