211421004442 has 8 divisors (see below), whose sum is σ = 318213867636. Its totient is φ = 105349715232.

The previous prime is 211421004329. The next prime is 211421004481. The reversal of 211421004442 is 244400124112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 195955843561 + 15465160881 = 442669^2 + 124359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211421004442² (a number of 23 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 180392763 + ... + 180393934.

Almost surely, 2^211421004442 is an apocalyptic number.

211421004442 is a deficient number, since it is larger than the sum of its proper divisors (106792863194).

211421004442 is a wasteful number, since it uses less digits than its factorization.

211421004442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360786992.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 211421004442 its reverse (244400124112), we get a palindrome (455821128554).

The spelling of 211421004442 in words is "two hundred eleven billion, four hundred twenty-one million, four thousand, four hundred forty-two".