101561857193 has 2 divisors, whose sum is σ = 101561857194. Its totient is φ = 101561857192.

The previous prime is 101561857153. The next prime is 101561857237. The reversal of 101561857193 is 391758165101.

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., 93726597904 + 7835259289 = 306148^2 + 88517^2 .

It is an emirp because it is prime and its reverse (391758165101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101561857193 - 2⁶ = 101561857129 is a prime.

It is not a weakly prime, because it can be changed into another prime (101561857123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50780928596 + 50780928597.

It is an arithmetic number, because the mean of its divisors is an integer number (50780928597).

Almost surely, 2^101561857193 is an apocalyptic number.

It is an amenable number.

101561857193 is a deficient number, since it is larger than the sum of its proper divisors (1).

101561857193 is an equidigital number, since it uses as much as digits as its factorization.

101561857193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 47.

The spelling of 101561857193 in words is "one hundred one billion, five hundred sixty-one million, eight hundred fifty-seven thousand, one hundred ninety-three".