21114224237 has 2 divisors, whose sum is σ = 21114224238. Its totient is φ = 21114224236.

The previous prime is 21114224189. The next prime is 21114224269. The reversal of 21114224237 is 73242241112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15359636356 + 5754587881 = 123934^2 + 75859^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114224237 - 2¹⁰ = 21114223213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114223237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557112118 + 10557112119.

It is an arithmetic number, because the mean of its divisors is an integer number (10557112119).

Almost surely, 2^21114224237 is an apocalyptic number.

It is an amenable number.

21114224237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114224237 is an equidigital number, since it uses as much as digits as its factorization.

21114224237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

Adding to 21114224237 its reverse (73242241112), we get a palindrome (94356465349).

The spelling of 21114224237 in words is "twenty-one billion, one hundred fourteen million, two hundred twenty-four thousand, two hundred thirty-seven".