212432123444 has 48 divisors (see below), whose sum is σ = 406871942400. Its totient is φ = 96662514816.

The previous prime is 212432123441. The next prime is 212432123461. The reversal of 212432123444 is 444321234212.

It is a happy number.

It is a super-2 number, since 2×212432123444² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212432123444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212432123441) 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, 189557 + ... + 678819.

It is an arithmetic number, because the mean of its divisors is an integer number (8476498800).

Almost surely, 2^212432123444 is an apocalyptic number.

It is an amenable number.

212432123444 is a deficient number, since it is larger than the sum of its proper divisors (194439818956).

212432123444 is a wasteful number, since it uses less digits than its factorization.

212432123444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489512 (or 489510 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

Adding to 212432123444 its reverse (444321234212), we get a palindrome (656753357656).

The spelling of 212432123444 in words is "two hundred twelve billion, four hundred thirty-two million, one hundred twenty-three thousand, four hundred forty-four".