1721204352047 has 2 divisors, whose sum is σ = 1721204352048. Its totient is φ = 1721204352046.

The previous prime is 1721204352031. The next prime is 1721204352137. The reversal of 1721204352047 is 7402534021271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1721204352047 - 2⁴ = 1721204352031 is a prime.

It is a super-2 number, since 2×1721204352047² (a number of 25 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 1721204352047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1721204352347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860602176023 + 860602176024.

It is an arithmetic number, because the mean of its divisors is an integer number (860602176024).

Almost surely, 2^{1721204352047} is an apocalyptic number.

1721204352047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721204352047 is an equidigital number, since it uses as much as digits as its factorization.

1721204352047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The spelling of 1721204352047 in words is "one trillion, seven hundred twenty-one billion, two hundred four million, three hundred fifty-two thousand, forty-seven".