161101201 has 4 divisors (see below), whose sum is σ = 163370304. Its totient is φ = 158832100.

The previous prime is 161101169. The next prime is 161101217. The reversal of 161101201 is 102101161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 102101161 = 53 ⋅1926437.

It is a cyclic number.

It is not a de Polignac number, because 161101201 - 2⁵ = 161101169 is a prime.

It is a super-3 number, since 3×161101201³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134445 + ... + 1134586.

It is an arithmetic number, because the mean of its divisors is an integer number (40842576).

Almost surely, 2^161101201 is an apocalyptic number.

It is an amenable number.

161101201 is a deficient number, since it is larger than the sum of its proper divisors (2269103).

161101201 is an equidigital number, since it uses as much as digits as its factorization.

161101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269102.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 161101201 is about 12692.5647920347. The cubic root of 161101201 is about 544.1261432983.

Adding to 161101201 its reverse (102101161), we get a palindrome (263202362).

The spelling of 161101201 in words is "one hundred sixty-one million, one hundred one thousand, two hundred one".