30212033330021 has 4 divisors (see below), whose sum is σ = 30212091632844. Its totient is φ = 30211975027200.

The previous prime is 30212033329981. The next prime is 30212033330057. The reversal of 30212033330021 is 12003333021203.

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 17796375030625 + 12415658299396 = 4218575^2 + 3523586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30212033330021 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 (30212033330071) 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, 28367090 + ... + 29412851.

It is an arithmetic number, because the mean of its divisors is an integer number (7553022908211).

Almost surely, 2^{30212033330021} is an apocalyptic number.

It is an amenable number.

30212033330021 is a deficient number, since it is larger than the sum of its proper divisors (58302823).

30212033330021 is an equidigital number, since it uses as much as digits as its factorization.

30212033330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58302822.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 30212033330021 its reverse (12003333021203), we get a palindrome (42215366351224).

The spelling of 30212033330021 in words is "thirty trillion, two hundred twelve billion, thirty-three million, three hundred thirty thousand, twenty-one".