120400217 has 8 divisors (see below), whose sum is σ = 137880000. Its totient is φ = 102990384.

The previous prime is 120400213. The next prime is 120400219. The reversal of 120400217 is 712004021.

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

It is not a de Polignac number, because 120400217 - 2² = 120400213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120400195 and 120400204.

It is not an unprimeable number, because it can be changed into a prime (120400211) 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, 13742 + ... + 20727.

It is an arithmetic number, because the mean of its divisors is an integer number (17235000).

Almost surely, 2^120400217 is an apocalyptic number.

It is an amenable number.

120400217 is a deficient number, since it is larger than the sum of its proper divisors (17479783).

120400217 is an equidigital number, since it uses as much as digits as its factorization.

120400217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34975.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 120400217 is about 10972.7032676547. The cubic root of 120400217 is about 493.7901508342.

Adding to 120400217 its reverse (712004021), we get a palindrome (832404238).

The spelling of 120400217 in words is "one hundred twenty million, four hundred thousand, two hundred seventeen".