2121339365 has 8 divisors (see below), whose sum is σ = 2546185848. Its totient is φ = 1696685760.

The previous prime is 2121339317. The next prime is 2121339391. The reversal of 2121339365 is 5639331212.

It is a Cunningham number, because it is equal to 46058²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 763637956 + 1357701409 = 27634^2 + 36847^2 .

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

It is not a de Polignac number, because 2121339365 - 2¹⁸ = 2121077221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22802 + ... + 69011.

It is an arithmetic number, because the mean of its divisors is an integer number (318273231).

Almost surely, 2^2121339365 is an apocalyptic number.

It is an amenable number.

2121339365 is a deficient number, since it is larger than the sum of its proper divisors (424846483).

2121339365 is an equidigital number, since it uses as much as digits as its factorization.

2121339365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96439.

The product of its digits is 29160, while the sum is 35.

The square root of 2121339365 is about 46058.0000108559. Note that the first 4 decimals coincide. The cubic root of 2121339365 is about 1284.9021338862.

The spelling of 2121339365 in words is "two billion, one hundred twenty-one million, three hundred thirty-nine thousand, three hundred sixty-five".