101720120 has 32 divisors (see below), whose sum is σ = 229338000. Its totient is φ = 40604928.

The previous prime is 101720119. The next prime is 101720153. The reversal of 101720120 is 21027101.

It is a junction number, because it is equal to n+sod(n) for n = 101720095 and 101720104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19556 + ... + 24204.

Almost surely, 2^101720120 is an apocalyptic number.

101720120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101720120 is an abundant number, since it is smaller than the sum of its proper divisors (127617880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101720120 is a wasteful number, since it uses less digits than its factorization.

101720120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207 (or 5203 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 101720120 is about 10085.6392955529. The cubic root of 101720120 is about 466.8051312477.

Adding to 101720120 its reverse (21027101), we get a palindrome (122747221).

The spelling of 101720120 in words is "one hundred one million, seven hundred twenty thousand, one hundred twenty".