213111123212 has 12 divisors (see below), whose sum is σ = 401632501536. Its totient is φ = 98358979920.

The previous prime is 213111123187. The next prime is 213111123227. The reversal of 213111123212 is 212321111312.

213111123212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049145364 + ... + 2049145467.

It is an arithmetic number, because the mean of its divisors is an integer number (33469375128).

Almost surely, 2^213111123212 is an apocalyptic number.

It is an amenable number.

213111123212 is a deficient number, since it is larger than the sum of its proper divisors (188521378324).

213111123212 is a wasteful number, since it uses less digits than its factorization.

213111123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098290848 (or 4098290846 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

Adding to 213111123212 its reverse (212321111312), we get a palindrome (425432234524).

The spelling of 213111123212 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twenty-three thousand, two hundred twelve".