161236101 has 16 divisors (see below), whose sum is σ = 234783360. Its totient is φ = 97823040.

The previous prime is 161236099. The next prime is 161236129. The reversal of 161236101 is 101632161.

It is not a de Polignac number, because 161236101 - 2¹ = 161236099 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161236151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26346 + ... + 31883.

It is an arithmetic number, because the mean of its divisors is an integer number (14673960).

Almost surely, 2^161236101 is an apocalyptic number.

It is an amenable number.

161236101 is a deficient number, since it is larger than the sum of its proper divisors (73547259).

161236101 is a wasteful number, since it uses less digits than its factorization.

161236101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58316.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 161236101 is about 12697.8778148161. The cubic root of 161236101 is about 544.2779777511.

Adding to 161236101 its reverse (101632161), we get a palindrome (262868262).

The spelling of 161236101 in words is "one hundred sixty-one million, two hundred thirty-six thousand, one hundred one".