212423214340 has 24 divisors (see below), whose sum is σ = 447955240320. Its totient is φ = 84613763808.

The previous prime is 212423214337. The next prime is 212423214407. The reversal of 212423214340 is 43412324212.

It is a junction number, because it is equal to n+sod(n) for n = 212423214299 and 212423214308.

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, 22215222 + ... + 22224781.

It is an arithmetic number, because the mean of its divisors is an integer number (18664801680).

Almost surely, 2^212423214340 is an apocalyptic number.

212423214340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212423214340 is an abundant number, since it is smaller than the sum of its proper divisors (235532025980).

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

212423214340 is a wasteful number, since it uses less digits than its factorization.

212423214340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44440251 (or 44440249 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 212423214340 its reverse (43412324212), we get a palindrome (255835538552).

The spelling of 212423214340 in words is "two hundred twelve billion, four hundred twenty-three million, two hundred fourteen thousand, three hundred forty".