161020101 has 8 divisors (see below), whose sum is σ = 234211104. Its totient is φ = 97587920.

The previous prime is 161020081. The next prime is 161020103. The reversal of 161020101 is 101020161.

It is a happy number.

161020101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161020101 - 2⁶ = 161020037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161020103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439666 + ... + 2439731.

It is an arithmetic number, because the mean of its divisors is an integer number (29276388).

Almost surely, 2^161020101 is an apocalyptic number.

161020101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161020101 is a deficient number, since it is larger than the sum of its proper divisors (73191003).

161020101 is a wasteful number, since it uses less digits than its factorization.

161020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4879411.

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

The square root of 161020101 is about 12689.3696060915. The cubic root of 161020101 is about 544.0348217419.

Adding to 161020101 its reverse (101020161), we get a palindrome (262040262).

The spelling of 161020101 in words is "one hundred sixty-one million, twenty thousand, one hundred one".