2121265411 has 4 divisors (see below), whose sum is σ = 2122456912. Its totient is φ = 2120073912.

The previous prime is 2121265403. The next prime is 2121265417. The reversal of 2121265411 is 1145621212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121265411 - 2³ = 2121265403 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2121265417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593076 + ... + 596641.

It is an arithmetic number, because the mean of its divisors is an integer number (530614228).

Almost surely, 2^2121265411 is an apocalyptic number.

2121265411 is a deficient number, since it is larger than the sum of its proper divisors (1191501).

2121265411 is a wasteful number, since it uses less digits than its factorization.

2121265411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191500.

The product of its digits is 960, while the sum is 25.

The square root of 2121265411 is about 46057.1971683037. The cubic root of 2121265411 is about 1284.8872023201.

Adding to 2121265411 its reverse (1145621212), we get a palindrome (3266886623).

The spelling of 2121265411 in words is "two billion, one hundred twenty-one million, two hundred sixty-five thousand, four hundred eleven".