120217720 has 32 divisors (see below), whose sum is σ = 309132000. Its totient is φ = 41217408.

The previous prime is 120217667. The next prime is 120217753. The reversal of 120217720 is 27712021.

It is a junction number, because it is equal to n+sod(n) for n = 120217691 and 120217700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214395 + ... + 214954.

It is an arithmetic number, because the mean of its divisors is an integer number (9660375).

Almost surely, 2^120217720 is an apocalyptic number.

120217720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120217720 is an abundant number, since it is smaller than the sum of its proper divisors (188914280).

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

120217720 is a wasteful number, since it uses less digits than its factorization.

120217720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429367 (or 429363 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 120217720 is about 10964.3841596325. The cubic root of 120217720 is about 493.5405366928.

Adding to 120217720 its reverse (27712021), we get a palindrome (147929741).

The spelling of 120217720 in words is "one hundred twenty million, two hundred seventeen thousand, seven hundred twenty".