21344114237 has 2 divisors, whose sum is σ = 21344114238. Its totient is φ = 21344114236.

The previous prime is 21344114213. The next prime is 21344114251. The reversal of 21344114237 is 73241144312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14282401081 + 7061713156 = 119509^2 + 84034^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344114237 - 2¹⁰ = 21344113213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344114257) 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, 10672057118 + 10672057119.

It is an arithmetic number, because the mean of its divisors is an integer number (10672057119).

Almost surely, 2^21344114237 is an apocalyptic number.

It is an amenable number.

21344114237 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344114237 is an equidigital number, since it uses as much as digits as its factorization.

21344114237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

Adding to 21344114237 its reverse (73241144312), we get a palindrome (94585258549).

The spelling of 21344114237 in words is "twenty-one billion, three hundred forty-four million, one hundred fourteen thousand, two hundred thirty-seven".