211421004441 has 24 divisors (see below), whose sum is σ = 299511321984. Its totient is φ = 132630094080.

The previous prime is 211421004329. The next prime is 211421004481. The reversal of 211421004441 is 144400124112.

It is not a de Polignac number, because 211421004441 - 2¹¹ = 211421002393 is a prime.

It is a super-2 number, since 2×211421004441² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211421004481) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4957951 + ... + 5000411.

It is an arithmetic number, because the mean of its divisors is an integer number (12479638416).

Almost surely, 2^211421004441 is an apocalyptic number.

It is an amenable number.

211421004441 is a deficient number, since it is larger than the sum of its proper divisors (88090317543).

211421004441 is a wasteful number, since it uses less digits than its factorization.

211421004441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48241 (or 48224 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 211421004441 its reverse (144400124112), we get a palindrome (355821128553).

The spelling of 211421004441 in words is "two hundred eleven billion, four hundred twenty-one million, four thousand, four hundred forty-one".