212224403420 has 12 divisors (see below), whose sum is σ = 445671247224. Its totient is φ = 84889761360.

The previous prime is 212224403389. The next prime is 212224403423. The reversal of 212224403420 is 24304422212.

It is a self number, because there is not a number n which added to its sum of digits gives 212224403420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212224403423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5305610066 + ... + 5305610105.

It is an arithmetic number, because the mean of its divisors is an integer number (37139270602).

Almost surely, 2^212224403420 is an apocalyptic number.

212224403420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212224403420 is an abundant number, since it is smaller than the sum of its proper divisors (233446843804).

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

212224403420 is a wasteful number, since it uses less digits than its factorization.

212224403420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611220180 (or 10611220178 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 212224403420 its reverse (24304422212), we get a palindrome (236528825632).

The spelling of 212224403420 in words is "two hundred twelve billion, two hundred twenty-four million, four hundred three thousand, four hundred twenty".