2121212324 has 48 divisors (see below), whose sum is σ = 4777414656. Its totient is φ = 799783200.

The previous prime is 2121212323. The next prime is 2121212369. The reversal of 2121212324 is 4232121212.

It is a junction number, because it is equal to n+sod(n) for n = 2121212296 and 2121212305.

It is not an unprimeable number, because it can be changed into a prime (2121212321) 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 15 ways as a sum of consecutive naturals, for example, 101534 + ... + 120629.

It is an arithmetic number, because the mean of its divisors is an integer number (99529472).

Almost surely, 2^2121212324 is an apocalyptic number.

It is an amenable number.

2121212324 is an abundant number, since it is smaller than the sum of its proper divisors (2656202332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121212324 is a wasteful number, since it uses less digits than its factorization.

2121212324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222216 (or 222214 counting only the distinct ones).

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

The square root of 2121212324 is about 46056.6208486901. The cubic root of 2121212324 is about 1284.8764836589.

Adding to 2121212324 its reverse (4232121212), we get a palindrome (6353333536).

The spelling of 2121212324 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-four".