211421104441 has 4 divisors (see below), whose sum is σ = 212516550772. Its totient is φ = 210325658112.

The previous prime is 211421104429. The next prime is 211421104481. The reversal of 211421104441 is 144401124112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54652620841 + 156768483600 = 233779^2 + 395940^2 .

It is a cyclic number.

It is not a de Polignac number, because 211421104441 - 2¹⁹ = 211420580153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211421104481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547722876 + ... + 547723261.

It is an arithmetic number, because the mean of its divisors is an integer number (53129137693).

Almost surely, 2^211421104441 is an apocalyptic number.

It is an amenable number.

211421104441 is a deficient number, since it is larger than the sum of its proper divisors (1095446331).

211421104441 is a wasteful number, since it uses less digits than its factorization.

211421104441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095446330.

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 211421104441 its reverse (144401124112), we get a palindrome (355822228553).

The spelling of 211421104441 in words is "two hundred eleven billion, four hundred twenty-one million, one hundred four thousand, four hundred forty-one".