120221717 has 32 divisors (see below), whose sum is σ = 155361024. Its totient is φ = 90316800.

The previous prime is 120221711. The next prime is 120221719. The reversal of 120221717 is 717122021.

It is not a de Polignac number, because 120221717 - 2⁴ = 120221701 is a prime.

It is a super-2 number, since 2×120221717² = 28906522476856178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120221692 and 120221701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356573 + ... + 356909.

It is an arithmetic number, because the mean of its divisors is an integer number (4855032).

Almost surely, 2^120221717 is an apocalyptic number.

It is an amenable number.

120221717 is a deficient number, since it is larger than the sum of its proper divisors (35139307).

120221717 is a wasteful number, since it uses less digits than its factorization.

120221717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 120221717 is about 10964.5664300965. The cubic root of 120221717 is about 493.5460063792.

Adding to 120221717 its reverse (717122021), we get a palindrome (837343738).

The spelling of 120221717 in words is "one hundred twenty million, two hundred twenty-one thousand, seven hundred seventeen".