2121340555 has 8 divisors (see below), whose sum is σ = 2545862400. Its totient is φ = 1696903296.

The previous prime is 2121340537. The next prime is 2121340561. The reversal of 2121340555 is 5550431212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121340555 - 2²¹ = 2119243403 is a prime.

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, 68886 + ... + 94804.

It is an arithmetic number, because the mean of its divisors is an integer number (318232800).

Almost surely, 2^2121340555 is an apocalyptic number.

2121340555 is a deficient number, since it is larger than the sum of its proper divisors (424521845).

2121340555 is a wasteful number, since it uses less digits than its factorization.

2121340555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42293.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2121340555 is about 46058.0129293481. The cubic root of 2121340555 is about 1284.9023741484.

Adding to 2121340555 its reverse (5550431212), we get a palindrome (7671771767).

The spelling of 2121340555 in words is "two billion, one hundred twenty-one million, three hundred forty thousand, five hundred fifty-five".