2120311265 has 8 divisors (see below), whose sum is σ = 2545171008. Its totient is φ = 1695717360.

The previous prime is 2120311241. The next prime is 2120311301. The reversal of 2120311265 is 5621130212.

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

It is a de Polignac number, because none of the positive numbers 2^k-2120311265 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 2120311265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48467 + ... + 81176.

It is an arithmetic number, because the mean of its divisors is an integer number (318146376).

Almost surely, 2^2120311265 is an apocalyptic number.

It is an amenable number.

2120311265 is a deficient number, since it is larger than the sum of its proper divisors (424859743).

2120311265 is a wasteful number, since it uses less digits than its factorization.

2120311265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132919.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2120311265 is about 46046.8377307280. The cubic root of 2120311265 is about 1284.6945258422.

Adding to 2120311265 its reverse (5621130212), we get a palindrome (7741441477).

The spelling of 2120311265 in words is "two billion, one hundred twenty million, three hundred eleven thousand, two hundred sixty-five".