10575721721501 has 2 divisors, whose sum is σ = 10575721721502. Its totient is φ = 10575721721500.

The previous prime is 10575721721483. The next prime is 10575721721533. The reversal of 10575721721501 is 10512712757501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10349668068100 + 226053653401 = 3217090^2 + 475451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10575721721501 is a prime.

It is a super-2 number, since 2×10575721721501² (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 (10575721721101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5287860860750 + 5287860860751.

It is an arithmetic number, because the mean of its divisors is an integer number (5287860860751).

Almost surely, 2^{10575721721501} is an apocalyptic number.

It is an amenable number.

10575721721501 is a deficient number, since it is larger than the sum of its proper divisors (1).

10575721721501 is an equidigital number, since it uses as much as digits as its factorization.

10575721721501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 171500, while the sum is 44.

The spelling of 10575721721501 in words is "ten trillion, five hundred seventy-five billion, seven hundred twenty-one million, seven hundred twenty-one thousand, five hundred one".