2121210433 has 4 divisors (see below), whose sum is σ = 2189636608. Its totient is φ = 2052784260.

The previous prime is 2121210431. The next prime is 2121210437. The reversal of 2121210433 is 3340121212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121210433 - 2¹ = 2121210431 is a prime.

It is a super-3 number, since 3×2121210433³ (a number of 29 digits) contains 333 as substring.

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 2121210433.

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 3 ways as a sum of consecutive naturals, for example, 34213041 + ... + 34213102.

It is an arithmetic number, because the mean of its divisors is an integer number (547409152).

Almost surely, 2^2121210433 is an apocalyptic number.

It is an amenable number.

2121210433 is a deficient number, since it is larger than the sum of its proper divisors (68426175).

2121210433 is an equidigital number, since it uses as much as digits as its factorization.

2121210433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68426174.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2121210433 is about 46056.6003196067. The cubic root of 2121210433 is about 1284.8761018486.

Adding to 2121210433 its reverse (3340121212), we get a palindrome (5461331645).

The spelling of 2121210433 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, four hundred thirty-three".