30021331012021 has 4 divisors (see below), whose sum is σ = 30031138702444. Its totient is φ = 30011523321600.

The previous prime is 30021331011977. The next prime is 30021331012027. The reversal of 30021331012021 is 12021013312003.

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 15345153109521 + 14676177902500 = 3917289^2 + 3830950^2 .

It is a cyclic number.

It is not a de Polignac number, because 30021331012021 - 2²⁹ = 30020794141109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30021331012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021331012027) 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, 4903840620 + ... + 4903846741.

It is an arithmetic number, because the mean of its divisors is an integer number (7507784675611).

Almost surely, 2^{30021331012021} is an apocalyptic number.

It is an amenable number.

30021331012021 is a deficient number, since it is larger than the sum of its proper divisors (9807690423).

30021331012021 is an equidigital number, since it uses as much as digits as its factorization.

30021331012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9807690422.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 30021331012021 its reverse (12021013312003), we get a palindrome (42042344324024).

The spelling of 30021331012021 in words is "thirty trillion, twenty-one billion, three hundred thirty-one million, twelve thousand, twenty-one".