2121212303 has 6 divisors (see below), whose sum is σ = 2467532736. Its totient is φ = 1818181932.

The previous prime is 2121212299. The next prime is 2121212311. The reversal of 2121212303 is 3032121212.

It is not a de Polignac number, because 2121212303 - 2² = 2121212299 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121212323) 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 5 ways as a sum of consecutive naturals, for example, 21644975 + ... + 21645072.

It is an arithmetic number, because the mean of its divisors is an integer number (411255456).

Almost surely, 2^2121212303 is an apocalyptic number.

2121212303 is a deficient number, since it is larger than the sum of its proper divisors (346320433).

2121212303 is an equidigital number, since it uses as much as digits as its factorization.

2121212303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43290061 (or 43290054 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121212303 is about 46056.6206207099. The cubic root of 2121212303 is about 1284.8764794188.

Adding to 2121212303 its reverse (3032121212), we get a palindrome (5153333515).

The spelling of 2121212303 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, three hundred three".