21028320000601 has 2 divisors, whose sum is σ = 21028320000602. Its totient is φ = 21028320000600.

The previous prime is 21028320000557. The next prime is 21028320000619. The reversal of 21028320000601 is 10600002382012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16063783441225 + 4964536559376 = 4007965^2 + 2228124^2 .

It is a cyclic number.

It is not a de Polignac number, because 21028320000601 - 2⁷ = 21028320000473 is a prime.

It is a super-2 number, since 2×21028320000601² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21028320000671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514160000300 + 10514160000301.

It is an arithmetic number, because the mean of its divisors is an integer number (10514160000301).

Almost surely, 2^{21028320000601} is an apocalyptic number.

It is an amenable number.

21028320000601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21028320000601 is an equidigital number, since it uses as much as digits as its factorization.

21028320000601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21028320000601 its reverse (10600002382012), we get a palindrome (31628322382613).

The spelling of 21028320000601 in words is "twenty-one trillion, twenty-eight billion, three hundred twenty million, six hundred one", and thus it is an aban number.