2121210434 has 16 divisors (see below), whose sum is σ = 3637960128. Its totient is φ = 908690352.

The previous prime is 2121210431. The next prime is 2121210437. The reversal of 2121210434 is 4340121212.

It is an interprime number because it is at equal distance from previous prime (2121210431) and next prime (2121210437).

It is a super-3 number, since 3×2121210434³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121210431) by changing a digit.

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, 857 + ... + 65139.

It is an arithmetic number, because the mean of its divisors is an integer number (227372508).

Almost surely, 2^2121210434 is an apocalyptic number.

2121210434 is a deficient number, since it is larger than the sum of its proper divisors (1516749694).

2121210434 is a wasteful number, since it uses less digits than its factorization.

2121210434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66649.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2121210434 is about 46056.6003304630. The cubic root of 2121210434 is about 1284.8761020505.

Adding to 2121210434 its reverse (4340121212), we get a palindrome (6461331646).

The spelling of 2121210434 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, four hundred thirty-four".