212221231232 has 64 divisors (see below), whose sum is σ = 428237379360. Its totient is φ = 104744202240.

The previous prime is 212221231223. The next prime is 212221231273. The reversal of 212221231232 is 232132122212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 212221231198 and 212221231207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13707848 + ... + 13723320.

Almost surely, 2^212221231232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214118689680).

212221231232 is an abundant number, since it is smaller than the sum of its proper divisors (216016148128).

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

212221231232 is a wasteful number, since it uses less digits than its factorization.

212221231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16861 (or 16849 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 212221231232 its reverse (232132122212), we get a palindrome (444353353444).

The spelling of 212221231232 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-two".