2121431212 has 12 divisors (see below), whose sum is σ = 3782552256. Its totient is φ = 1040702000.

The previous prime is 2121431189. The next prime is 2121431231. The reversal of 2121431212 is 2121341212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121431212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003164 + ... + 5003587.

It is an arithmetic number, because the mean of its divisors is an integer number (315212688).

Almost surely, 2^2121431212 is an apocalyptic number.

It is an amenable number.

2121431212 is a deficient number, since it is larger than the sum of its proper divisors (1661121044).

2121431212 is a wasteful number, since it uses less digits than its factorization.

2121431212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006808 (or 10006806 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 2121431212 is about 46058.9970798323. The cubic root of 2121431212 is about 1284.9206776272.

Adding to 2121431212 its reverse (2121341212), we get a palindrome (4242772424).

Subtracting from 2121431212 its reverse (2121341212), we obtain a square (90000 = 300²).

The spelling of 2121431212 in words is "two billion, one hundred twenty-one million, four hundred thirty-one thousand, two hundred twelve".