212240323140 has 48 divisors (see below), whose sum is σ = 595313759040. Its totient is φ = 56498290560.

The previous prime is 212240323133. The next prime is 212240323153. The reversal of 212240323140 is 41323042212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212240323140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063235 + ... + 3131754.

It is an arithmetic number, because the mean of its divisors is an integer number (12402369980).

Almost surely, 2^212240323140 is an apocalyptic number.

212240323140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212240323140 is an abundant number, since it is smaller than the sum of its proper divisors (383073435900).

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

212240323140 is a wasteful number, since it uses less digits than its factorization.

212240323140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6195572 (or 6195570 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 212240323140 its reverse (41323042212), we get a palindrome (253563365352).

The spelling of 212240323140 in words is "two hundred twelve billion, two hundred forty million, three hundred twenty-three thousand, one hundred forty".