21441214433 has 2 divisors, whose sum is σ = 21441214434. Its totient is φ = 21441214432.

The previous prime is 21441214393. The next prime is 21441214439. The reversal of 21441214433 is 33441214412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20640494224 + 800720209 = 143668^2 + 28297^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441214433 - 2¹² = 21441210337 is a prime.

It is a super-2 number, since 2×21441214433² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21441214396 and 21441214405.

It is not a weakly prime, because it can be changed into another prime (21441214439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720607216 + 10720607217.

It is an arithmetic number, because the mean of its divisors is an integer number (10720607217).

Almost surely, 2^21441214433 is an apocalyptic number.

It is an amenable number.

21441214433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441214433 is an equidigital number, since it uses as much as digits as its factorization.

21441214433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

Adding to 21441214433 its reverse (33441214412), we get a palindrome (54882428845).

The spelling of 21441214433 in words is "twenty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred thirty-three".