212420241240 has 128 divisors (see below), whose sum is σ = 649664971200. Its totient is φ = 55544053760.

The previous prime is 212420241221. The next prime is 212420241251. The reversal of 212420241240 is 42142024212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 212420241240.

It is a congruent number.

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, 12005200 + ... + 12022880.

Almost surely, 2^212420241240 is an apocalyptic number.

212420241240 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 212420241240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324832485600).

212420241240 is an abundant number, since it is smaller than the sum of its proper divisors (437244729960).

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

212420241240 is a wasteful number, since it uses less digits than its factorization.

212420241240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19637 (or 19633 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 212420241240 its reverse (42142024212), we get a palindrome (254562265452).

The spelling of 212420241240 in words is "two hundred twelve billion, four hundred twenty million, two hundred forty-one thousand, two hundred forty".