120215771 has 8 divisors (see below), whose sum is σ = 130919040. Its totient is φ = 109720512.

The previous prime is 120215747. The next prime is 120215783. The reversal of 120215771 is 177512021.

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

It is a cyclic number.

It is not a de Polignac number, because 120215771 - 2¹⁸ = 119953627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120215771.

It is not an unprimeable number, because it can be changed into a prime (120215471) 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, 50795 + ... + 53108.

It is an arithmetic number, because the mean of its divisors is an integer number (16364880).

Almost surely, 2^120215771 is an apocalyptic number.

120215771 is a deficient number, since it is larger than the sum of its proper divisors (10703269).

120215771 is a wasteful number, since it uses less digits than its factorization.

120215771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104005.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 120215771 is about 10964.2952805915. The cubic root of 120215771 is about 493.5378695439.

Adding to 120215771 its reverse (177512021), we get a palindrome (297727792).

The spelling of 120215771 in words is "one hundred twenty million, two hundred fifteen thousand, seven hundred seventy-one".