212321111312 has 40 divisors (see below), whose sum is σ = 443788856856. Its totient is φ = 98030606336.

The previous prime is 212321111311. The next prime is 212321111347. The reversal of 212321111312 is 213111123212.

It can be written as a sum of positive squares in 4 ways, for example, as 99575589136 + 112745522176 = 315556^2 + 335776^2 .

It is a super-2 number, since 2×212321111312² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212321111311) 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 7 ways as a sum of consecutive naturals, for example, 7349663 + ... + 7378494.

Almost surely, 2^212321111312 is an apocalyptic number.

It is an amenable number.

212321111312 is an abundant number, since it is smaller than the sum of its proper divisors (231467745544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212321111312 is a wasteful number, since it uses less digits than its factorization.

212321111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14728235 (or 14728229 counting only the distinct ones).

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

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

The spelling of 212321111312 in words is "two hundred twelve billion, three hundred twenty-one million, one hundred eleven thousand, three hundred twelve".