211242424340 has 12 divisors (see below), whose sum is σ = 443609091156. Its totient is φ = 84496969728.

The previous prime is 211242424339. The next prime is 211242424417. The reversal of 211242424340 is 43424242112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 140245756036 + 70996668304 = 374494^2 + 266452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5281060589 + ... + 5281060628.

It is an arithmetic number, because the mean of its divisors is an integer number (36967424263).

Almost surely, 2^211242424340 is an apocalyptic number.

211242424340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211242424340 is an abundant number, since it is smaller than the sum of its proper divisors (232366666816).

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

211242424340 is a wasteful number, since it uses less digits than its factorization.

211242424340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10562121226 (or 10562121224 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 211242424340 its reverse (43424242112), we get a palindrome (254666666452).

The spelling of 211242424340 in words is "two hundred eleven billion, two hundred forty-two million, four hundred twenty-four thousand, three hundred forty".