21753452223137 has 2 divisors, whose sum is σ = 21753452223138. Its totient is φ = 21753452223136.

The previous prime is 21753452223109. The next prime is 21753452223193. The reversal of 21753452223137 is 73132225435712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11211943283776 + 10541508939361 = 3348424^2 + 3246769^2 .

It is a cyclic number.

It is not a de Polignac number, because 21753452223137 - 2⁸ = 21753452222881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21753452223091 and 21753452223100.

It is not a weakly prime, because it can be changed into another prime (21753452723137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10876726111568 + 10876726111569.

It is an arithmetic number, because the mean of its divisors is an integer number (10876726111569).

Almost surely, 2^{21753452223137} is an apocalyptic number.

It is an amenable number.

21753452223137 is a deficient number, since it is larger than the sum of its proper divisors (1).

21753452223137 is an equidigital number, since it uses as much as digits as its factorization.

21753452223137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 47.

Adding to 21753452223137 its reverse (73132225435712), we get a palindrome (94885677658849).

The spelling of 21753452223137 in words is "twenty-one trillion, seven hundred fifty-three billion, four hundred fifty-two million, two hundred twenty-three thousand, one hundred thirty-seven".