11213123212 has 48 divisors (see below), whose sum is σ = 20697397504. Its totient is φ = 5308416000.

The previous prime is 11213123191. The next prime is 11213123213. The reversal of 11213123212 is 21232131211.

11213123212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11213123212.

It is not an unprimeable number, because it can be changed into a prime (11213123213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1456012 + ... + 1463692.

Almost surely, 2^11213123212 is an apocalyptic number.

It is an amenable number.

11213123212 is a deficient number, since it is larger than the sum of its proper divisors (9484274292).

11213123212 is a wasteful number, since it uses less digits than its factorization.

11213123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970 (or 7968 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 11213123212 its reverse (21232131211), we get a palindrome (32445254423).

The spelling of 11213123212 in words is "eleven billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred twelve".