211243140330 has 16 divisors (see below), whose sum is σ = 506983536864. Its totient is φ = 56331504080.

The previous prime is 211243140307. The next prime is 211243140371. The reversal of 211243140330 is 33041342112.

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 211243140330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3520718976 + ... + 3520719035.

It is an arithmetic number, because the mean of its divisors is an integer number (31686471054).

Almost surely, 2^211243140330 is an apocalyptic number.

211243140330 is an abundant number, since it is smaller than the sum of its proper divisors (295740396534).

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

211243140330 is a wasteful number, since it uses less digits than its factorization.

211243140330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041438021.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 211243140330 its reverse (33041342112), we get a palindrome (244284482442).

The spelling of 211243140330 in words is "two hundred eleven billion, two hundred forty-three million, one hundred forty thousand, three hundred thirty".