21003322301173 has 2 divisors, whose sum is σ = 21003322301174. Its totient is φ = 21003322301172.

The previous prime is 21003322301149. The next prime is 21003322301239. The reversal of 21003322301173 is 37110322330012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10626406873489 + 10376915427684 = 3259817^2 + 3221322^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003322301173 - 2⁹ = 21003322300661 is a prime.

It is a super-2 number, since 2×21003322301173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003322001173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501661150586 + 10501661150587.

It is an arithmetic number, because the mean of its divisors is an integer number (10501661150587).

Almost surely, 2^{21003322301173} is an apocalyptic number.

It is an amenable number.

21003322301173 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003322301173 is an equidigital number, since it uses as much as digits as its factorization.

21003322301173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 21003322301173 its reverse (37110322330012), we get a palindrome (58113644631185).

The spelling of 21003322301173 in words is "twenty-one trillion, three billion, three hundred twenty-two million, three hundred one thousand, one hundred seventy-three".