2121285343 has 4 divisors (see below), whose sum is σ = 2232931960. Its totient is φ = 2009638728.

The previous prime is 2121285307. The next prime is 2121285349. The reversal of 2121285343 is 3435821212.

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 2121285343 - 2¹⁷ = 2121154271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121285349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55823280 + ... + 55823317.

It is an arithmetic number, because the mean of its divisors is an integer number (558232990).

Almost surely, 2^2121285343 is an apocalyptic number.

2121285343 is a deficient number, since it is larger than the sum of its proper divisors (111646617).

2121285343 is a wasteful number, since it uses less digits than its factorization.

2121285343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111646616.

The product of its digits is 11520, while the sum is 31.

The square root of 2121285343 is about 46057.4135509149. The cubic root of 2121285343 is about 1284.8912266934.

The spelling of 2121285343 in words is "two billion, one hundred twenty-one million, two hundred eighty-five thousand, three hundred forty-three".