2121030343 has 4 divisors (see below), whose sum is σ = 2133290808. Its totient is φ = 2108769880.

The previous prime is 2121030337. The next prime is 2121030349. The reversal of 2121030343 is 3430301212.

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

It is an interprime number because it is at equal distance from previous prime (2121030337) and next prime (2121030349).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121030343 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 2121030343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121030349) 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, 6129973 + ... + 6130318.

It is an arithmetic number, because the mean of its divisors is an integer number (533322702).

Almost surely, 2^2121030343 is an apocalyptic number.

2121030343 is a deficient number, since it is larger than the sum of its proper divisors (12260465).

2121030343 is a wasteful number, since it uses less digits than its factorization.

2121030343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260464.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2121030343 is about 46054.6451837380. The cubic root of 2121030343 is about 1284.8397389804.

Adding to 2121030343 its reverse (3430301212), we get a palindrome (5551331555).

The spelling of 2121030343 in words is "two billion, one hundred twenty-one million, thirty thousand, three hundred forty-three".