120020171016569 has 4 divisors (see below), whose sum is σ = 122573791676544. Its totient is φ = 117466550356596.

The previous prime is 120020171016467. The next prime is 120020171016589. The reversal of 120020171016569 is 965610171020021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120020171016569 - 2¹⁶ = 120020170951033 is a prime.

It is a super-2 number, since 2×120020171016569² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120020171016589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276810329917 + ... + 1276810330010.

It is an arithmetic number, because the mean of its divisors is an integer number (30643447919136).

Almost surely, 2^{120020171016569} is an apocalyptic number.

It is an amenable number.

120020171016569 is a deficient number, since it is larger than the sum of its proper divisors (2553620659975).

120020171016569 is an equidigital number, since it uses as much as digits as its factorization.

120020171016569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553620659974.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 120020171016569 in words is "one hundred twenty trillion, twenty billion, one hundred seventy-one million, sixteen thousand, five hundred sixty-nine".