21473929703201 has 2 divisors, whose sum is σ = 21473929703202. Its totient is φ = 21473929703200.

The previous prime is 21473929703153. The next prime is 21473929703221. The reversal of 21473929703201 is 10230792937412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17099473792801 + 4374455910400 = 4135151^2 + 2091520^2 .

It is a cyclic number.

It is not a de Polignac number, because 21473929703201 - 2¹⁰ = 21473929702177 is a prime.

It is a super-2 number, since 2×21473929703201² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21473929703201.

It is not a weakly prime, because it can be changed into another prime (21473929703221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10736964851600 + 10736964851601.

It is an arithmetic number, because the mean of its divisors is an integer number (10736964851601).

Almost surely, 2^{21473929703201} is an apocalyptic number.

It is an amenable number.

21473929703201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21473929703201 is an equidigital number, since it uses as much as digits as its factorization.

21473929703201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 21473929703201 in words is "twenty-one trillion, four hundred seventy-three billion, nine hundred twenty-nine million, seven hundred three thousand, two hundred one".