2121231212 has 48 divisors (see below), whose sum is σ = 4129305600. Its totient is φ = 948879360.

The previous prime is 2121231197. The next prime is 2121231223. The reversal of 2121231212 is 2121321212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130412 + ... + 145772.

It is an arithmetic number, because the mean of its divisors is an integer number (86027200).

Almost surely, 2^2121231212 is an apocalyptic number.

It is an amenable number.

2121231212 is a deficient number, since it is larger than the sum of its proper divisors (2008074388).

2121231212 is a wasteful number, since it uses less digits than its factorization.

2121231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15486 (or 15484 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 2121231212 is about 46056.8259001855. The cubic root of 2121231212 is about 1284.8802973074.

Adding to 2121231212 its reverse (2121321212), we get a palindrome (4242552424).

Subtracting 2121231212 from its reverse (2121321212), we obtain a square (90000 = 300²).

The spelling of 2121231212 in words is "two billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twelve".