211041243434442 has 64 divisors (see below), whose sum is σ = 428035446558720. Its totient is φ = 69361194888384.

The previous prime is 211041243434429. The next prime is 211041243434453. The reversal of 211041243434442 is 244434342140112.

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 211041243434442.

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, 262760113 + ... + 263562059.

It is an arithmetic number, because the mean of its divisors is an integer number (6688053852480).

Almost surely, 2^{211041243434442} is an apocalyptic number.

211041243434442 is an abundant number, since it is smaller than the sum of its proper divisors (216994203124278).

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

211041243434442 is a wasteful number, since it uses less digits than its factorization.

211041243434442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803907.

The product of its (nonzero) digits is 294912, while the sum is 39.

Adding to 211041243434442 its reverse (244434342140112), we get a palindrome (455475585574554).

The spelling of 211041243434442 in words is "two hundred eleven trillion, forty-one billion, two hundred forty-three million, four hundred thirty-four thousand, four hundred forty-two".