20121230212 has 12 divisors (see below), whose sum is σ = 35213145856. Its totient is φ = 10060331400.

The previous prime is 20121230203. The next prime is 20121230249. The reversal of 20121230212 is 21203212102.

It is a happy number.

It is an unprimeable number.

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, 245653 + ... + 317155.

Almost surely, 2^20121230212 is an apocalyptic number.

It is an amenable number.

20121230212 is a deficient number, since it is larger than the sum of its proper divisors (15091915644).

20121230212 is a wasteful number, since it uses less digits than its factorization.

20121230212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141858 (or 141856 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121230212 its reverse (21203212102), we get a palindrome (41324442314).

The spelling of 20121230212 in words is "twenty billion, one hundred twenty-one million, two hundred thirty thousand, two hundred twelve".