212230021332 has 96 divisors (see below), whose sum is σ = 573467195392. Its totient is φ = 59835563136.

The previous prime is 212230021327. The next prime is 212230021387. The reversal of 212230021332 is 233120032212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 212230021299 and 212230021308.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2405178 + ... + 2491854.

Almost surely, 2^212230021332 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 212230021332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286733597696).

212230021332 is an abundant number, since it is smaller than the sum of its proper divisors (361237174060).

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

212230021332 is a wasteful number, since it uses less digits than its factorization.

212230021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87077 (or 87075 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 212230021332 its reverse (233120032212), we get a palindrome (445350053544).

The spelling of 212230021332 in words is "two hundred twelve billion, two hundred thirty million, twenty-one thousand, three hundred thirty-two".