212222324440 has 32 divisors (see below), whose sum is σ = 545714549280. Its totient is φ = 72761939712.

The previous prime is 212222324401. The next prime is 212222324443. The reversal of 212222324440 is 44423222212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 212222324399 and 212222324408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222324443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378968157 + ... + 378968716.

It is an arithmetic number, because the mean of its divisors is an integer number (17053579665).

Almost surely, 2^212222324440 is an apocalyptic number.

212222324440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222324440 is an abundant number, since it is smaller than the sum of its proper divisors (333492224840).

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

212222324440 is a wasteful number, since it uses less digits than its factorization.

212222324440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757936891 (or 757936887 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 212222324440 its reverse (44423222212), we get a palindrome (256645546652).

The spelling of 212222324440 in words is "two hundred twelve billion, two hundred twenty-two million, three hundred twenty-four thousand, four hundred forty".