2121434212 has 12 divisors (see below), whose sum is σ = 3716993980. Its totient is φ = 1059435936.

The previous prime is 2121434201. The next prime is 2121434219. The reversal of 2121434212 is 2124341212.

It can be written as a sum of positive squares in 2 ways, for example, as 1141493796 + 979940416 = 33786^2 + 31304^2 .

It is not an unprimeable number, because it can be changed into a prime (2121434219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316563 + ... + 323194.

Almost surely, 2^2121434212 is an apocalyptic number.

It is an amenable number.

2121434212 is a deficient number, since it is larger than the sum of its proper divisors (1595559768).

2121434212 is a wasteful number, since it uses less digits than its factorization.

2121434212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640590 (or 640588 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 2121434212 is about 46059.0296467479. The cubic root of 2121434212 is about 1284.9212833126.

Adding to 2121434212 its reverse (2124341212), we get a palindrome (4245775424).

The spelling of 2121434212 in words is "two billion, one hundred twenty-one million, four hundred thirty-four thousand, two hundred twelve".