30321405756421 has 6 divisors (see below), whose sum is σ = 32833238186130. Its totient is φ = 27988989928848.

The previous prime is 30321405756419. The next prime is 30321405756451. The reversal of 30321405756421 is 12465750412303.

It can be written as a sum of positive squares in 3 ways, for example, as 83350577025 + 30238055179396 = 288705^2 + 5498914^2 .

It is not a de Polignac number, because 30321405756421 - 2¹ = 30321405756419 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 (30321405756451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89708300886 + ... + 89708301223.

It is an arithmetic number, because the mean of its divisors is an integer number (5472206364355).

Almost surely, 2^{30321405756421} is an apocalyptic number.

It is an amenable number.

30321405756421 is a deficient number, since it is larger than the sum of its proper divisors (2511832429709).

30321405756421 is a wasteful number, since it uses less digits than its factorization.

30321405756421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179416602135 (or 179416602122 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 30321405756421 in words is "thirty trillion, three hundred twenty-one billion, four hundred five million, seven hundred fifty-six thousand, four hundred twenty-one".