212224124420 has 72 divisors (see below), whose sum is σ = 565563539520. Its totient is φ = 66147775680.

The previous prime is 212224124417. The next prime is 212224124429. The reversal of 212224124420 is 24421422212.

It is a self number, because there is not a number n which added to its sum of digits gives 212224124420.

It is not an unprimeable number, because it can be changed into a prime (212224124429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9832640 + ... + 9854199.

It is an arithmetic number, because the mean of its divisors is an integer number (7855049160).

Almost surely, 2^212224124420 is an apocalyptic number.

212224124420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212224124420 is an abundant number, since it is smaller than the sum of its proper divisors (353339415100).

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

212224124420 is a wasteful number, since it uses less digits than its factorization.

212224124420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19686873 (or 19686864 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 212224124420 its reverse (24421422212), we get a palindrome (236645546632).

The spelling of 212224124420 in words is "two hundred twelve billion, two hundred twenty-four million, one hundred twenty-four thousand, four hundred twenty".