30212330021 has 4 divisors (see below), whose sum is σ = 31186921344. Its totient is φ = 29237738700.

The previous prime is 30212329993. The next prime is 30212330023. The reversal of 30212330021 is 12003321203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30212330021 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 (30212330023) 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, 487295615 + ... + 487295676.

It is an arithmetic number, because the mean of its divisors is an integer number (7796730336).

Almost surely, 2^30212330021 is an apocalyptic number.

30212330021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30212330021 is a deficient number, since it is larger than the sum of its proper divisors (974591323).

30212330021 is an equidigital number, since it uses as much as digits as its factorization.

30212330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974591322.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30212330021 its reverse (12003321203), we get a palindrome (42215651224).

The spelling of 30212330021 in words is "thirty billion, two hundred twelve million, three hundred thirty thousand, twenty-one".