212234144140 has 96 divisors (see below), whose sum is σ = 484776835200. Its totient is φ = 77732167680.

The previous prime is 212234144137. The next prime is 212234144167. The reversal of 212234144140 is 41441432212.

It is a junction number, because it is equal to n+sod(n) for n = 212234144099 and 212234144108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4983256 + ... + 5025664.

It is an arithmetic number, because the mean of its divisors is an integer number (5049758700).

Almost surely, 2^212234144140 is an apocalyptic number.

212234144140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212234144140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242388417600).

212234144140 is an abundant number, since it is smaller than the sum of its proper divisors (272542691060).

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

212234144140 is a wasteful number, since it uses less digits than its factorization.

212234144140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42835 (or 42833 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 212234144140 its reverse (41441432212), we get a palindrome (253675576352).

The spelling of 212234144140 in words is "two hundred twelve billion, two hundred thirty-four million, one hundred forty-four thousand, one hundred forty".