161101516216101 has 4 divisors (see below), whose sum is σ = 214802021621472. Its totient is φ = 107401010810732.

The previous prime is 161101516216087. The next prime is 161101516216129. The reversal of 161101516216101 is 101612615101161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161101516216101 - 2¹⁰ = 161101516215077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161101516916101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26850252702681 + ... + 26850252702686.

It is an arithmetic number, because the mean of its divisors is an integer number (53700505405368).

Almost surely, 2^{161101516216101} is an apocalyptic number.

It is an amenable number.

161101516216101 is a deficient number, since it is larger than the sum of its proper divisors (53700505405371).

161101516216101 is an equidigital number, since it uses as much as digits as its factorization.

161101516216101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53700505405370.

The product of its (nonzero) digits is 2160, while the sum is 33.

The spelling of 161101516216101 in words is "one hundred sixty-one trillion, one hundred one billion, five hundred sixteen million, two hundred sixteen thousand, one hundred one".