21411444224237 has 2 divisors, whose sum is σ = 21411444224238. Its totient is φ = 21411444224236.

The previous prime is 21411444224189. The next prime is 21411444224251. The reversal of 21411444224237 is 73242244411412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21410850278596 + 593945641 = 4627186^2 + 24371^2 .

It is a cyclic number.

It is not a de Polignac number, because 21411444224237 - 2¹² = 21411444220141 is a prime.

It is a super-2 number, since 2×21411444224237² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21411444224194 and 21411444224203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21411444224837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705722112118 + 10705722112119.

It is an arithmetic number, because the mean of its divisors is an integer number (10705722112119).

Almost surely, 2^{21411444224237} is an apocalyptic number.

It is an amenable number.

21411444224237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411444224237 is an equidigital number, since it uses as much as digits as its factorization.

21411444224237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 344064, while the sum is 41.

Adding to 21411444224237 its reverse (73242244411412), we get a palindrome (94653688635649).

The spelling of 21411444224237 in words is "twenty-one trillion, four hundred eleven billion, four hundred forty-four million, two hundred twenty-four thousand, two hundred thirty-seven".