2123111212 has 12 divisors (see below), whose sum is σ = 3731670880. Its totient is φ = 1056919536.

The previous prime is 2123111173. The next prime is 2123111219. The reversal of 2123111212 is 2121113212.

It is not an unprimeable number, because it can be changed into a prime (2123111219) 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, 1157988 + ... + 1159819.

Almost surely, 2^2123111212 is an apocalyptic number.

It is an amenable number.

2123111212 is a deficient number, since it is larger than the sum of its proper divisors (1608559668).

2123111212 is a wasteful number, since it uses less digits than its factorization.

2123111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318040 (or 2318038 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 2123111212 is about 46077.2309497869. The cubic root of 2123111212 is about 1285.2597721572.

Adding to 2123111212 its reverse (2121113212), we get a palindrome (4244224424).

The spelling of 2123111212 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, two hundred twelve".