212243444434420 has 48 divisors (see below), whose sum is σ = 509593288498560. Its totient is φ = 72739320683904.

The previous prime is 212243444434403. The next prime is 212243444434423. The reversal of 212243444434420 is 24434444342212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212243444434423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310702030 + ... + 311384389.

It is an arithmetic number, because the mean of its divisors is an integer number (10616526843720).

Almost surely, 2^{212243444434420} is an apocalyptic number.

212243444434420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212243444434420 is an abundant number, since it is smaller than the sum of its proper divisors (297349844064140).

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

212243444434420 is a wasteful number, since it uses less digits than its factorization.

212243444434420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622088872 (or 622088870 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 43.

Adding to 212243444434420 its reverse (24434444342212), we get a palindrome (236677888776632).

The spelling of 212243444434420 in words is "two hundred twelve trillion, two hundred forty-three billion, four hundred forty-four million, four hundred thirty-four thousand, four hundred twenty".