120431031163565 has 4 divisors (see below), whose sum is σ = 144517237396284. Its totient is φ = 96344824930848.

The previous prime is 120431031163481. The next prime is 120431031163571. The reversal of 120431031163565 is 565361130134021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14699456316169 + 105731574847396 = 3833987^2 + 10282586^2 .

It is a cyclic number.

It is not a de Polignac number, because 120431031163565 - 2¹⁸ = 120431030901421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12043103116352 + ... + 12043103116361.

It is an arithmetic number, because the mean of its divisors is an integer number (36129309349071).

Almost surely, 2^{120431031163565} is an apocalyptic number.

It is an amenable number.

120431031163565 is a deficient number, since it is larger than the sum of its proper divisors (24086206232719).

120431031163565 is an equidigital number, since it uses as much as digits as its factorization.

120431031163565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24086206232718.

The product of its (nonzero) digits is 194400, while the sum is 41.

Adding to 120431031163565 its reverse (565361130134021), we get a palindrome (685792161297586).

The spelling of 120431031163565 in words is "one hundred twenty trillion, four hundred thirty-one billion, thirty-one million, one hundred sixty-three thousand, five hundred sixty-five".