101020161 has 16 divisors (see below), whose sum is σ = 147686400. Its totient is φ = 60912720.

The previous prime is 101020159. The next prime is 101020189. The reversal of 101020161 is 161020101.

It is a happy number.

It is not a de Polignac number, because 101020161 - 2¹ = 101020159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101020111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1125 + ... + 14258.

It is an arithmetic number, because the mean of its divisors is an integer number (9230400).

Almost surely, 2^101020161 is an apocalyptic number.

101020161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101020161 is a deficient number, since it is larger than the sum of its proper divisors (46666239).

101020161 is a wasteful number, since it uses less digits than its factorization.

101020161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596.

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

The square root of 101020161 is about 10050.8786183099. The cubic root of 101020161 is about 465.7319355072.

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

The spelling of 101020161 in words is "one hundred one million, twenty thousand, one hundred sixty-one".