2121043430 has 32 divisors (see below), whose sum is σ = 4206217248. Its totient is φ = 763648000.

The previous prime is 2121043427. The next prime is 2121043433. The reversal of 2121043430 is 343401212.

It is an interprime number because it is at equal distance from previous prime (2121043427) and next prime (2121043433).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121043433) 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 15 ways as a sum of consecutive naturals, for example, 84347 + ... + 106566.

It is an arithmetic number, because the mean of its divisors is an integer number (131444289).

Almost surely, 2^2121043430 is an apocalyptic number.

2121043430 is a deficient number, since it is larger than the sum of its proper divisors (2085173818).

2121043430 is a wasteful number, since it uses less digits than its factorization.

2121043430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191032.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2121043430 is about 46054.7872647350. The cubic root of 2121043430 is about 1284.8423815111.

Adding to 2121043430 its reverse (343401212), we get a palindrome (2464444642).

The spelling of 2121043430 in words is "two billion, one hundred twenty-one million, forty-three thousand, four hundred thirty".