21411012445 has 4 divisors (see below), whose sum is σ = 25693214940. Its totient is φ = 17128809952.

The previous prime is 21411012443. The next prime is 21411012449. The reversal of 21411012445 is 54421011412.

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 15552334681 + 5858677764 = 124709^2 + 76542^2 .

It is a cyclic number.

It is not a de Polignac number, because 21411012445 - 2¹ = 21411012443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411012443) 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, 2141101240 + ... + 2141101249.

It is an arithmetic number, because the mean of its divisors is an integer number (6423303735).

Almost surely, 2^21411012445 is an apocalyptic number.

It is an amenable number.

21411012445 is a deficient number, since it is larger than the sum of its proper divisors (4282202495).

21411012445 is an equidigital number, since it uses as much as digits as its factorization.

21411012445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282202494.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 21411012445 its reverse (54421011412), we get a palindrome (75832023857).

The spelling of 21411012445 in words is "twenty-one billion, four hundred eleven million, twelve thousand, four hundred forty-five".