1601726017121 has 2 divisors, whose sum is σ = 1601726017122. Its totient is φ = 1601726017120.

The previous prime is 1601726017063. The next prime is 1601726017153. The reversal of 1601726017121 is 1217106271061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322557500625 + 279168516496 = 1150025^2 + 528364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601726017121 - 2³⁸ = 1326848110177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601726010121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800863008560 + 800863008561.

It is an arithmetic number, because the mean of its divisors is an integer number (800863008561).

Almost surely, 2^{1601726017121} is an apocalyptic number.

It is an amenable number.

1601726017121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601726017121 is an equidigital number, since it uses as much as digits as its factorization.

1601726017121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The spelling of 1601726017121 in words is "one trillion, six hundred one billion, seven hundred twenty-six million, seventeen thousand, one hundred twenty-one".