161701101 has 12 divisors (see below), whose sum is σ = 235882140. Its totient is φ = 106732800.

The previous prime is 161701087. The next prime is 161701157. The reversal of 161701101 is 101107161.

It can be written as a sum of positive squares in 2 ways, for example, as 117744201 + 43956900 = 10851^2 + 6630^2 .

It is not a de Polignac number, because 161701101 - 2⁵ = 161701069 is a prime.

It is a super-2 number, since 2×161701101² = 52294492129224402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161701901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88036 + ... + 89853.

It is an arithmetic number, because the mean of its divisors is an integer number (19656845).

Almost surely, 2^161701101 is an apocalyptic number.

It is an amenable number.

161701101 is a deficient number, since it is larger than the sum of its proper divisors (74181039).

161701101 is a wasteful number, since it uses less digits than its factorization.

161701101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177996 (or 177993 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 18.

The square root of 161701101 is about 12716.1747786038. The cubic root of 161701101 is about 544.8007025970.

Adding to 161701101 its reverse (101107161), we get a palindrome (262808262).

It can be divided in two parts, 16170 and 1101, that added together give a palindrome (17271).

The spelling of 161701101 in words is "one hundred sixty-one million, seven hundred one thousand, one hundred one".