21522401130137 has 2 divisors, whose sum is σ = 21522401130138. Its totient is φ = 21522401130136.

The previous prime is 21522401129927. The next prime is 21522401130149. The reversal of 21522401130137 is 73103110422512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15841705466896 + 5680695663241 = 3980164^2 + 2383421^2 .

It is a cyclic number.

It is not a de Polignac number, because 21522401130137 - 2¹² = 21522401126041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21522401330137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761200565068 + 10761200565069.

It is an arithmetic number, because the mean of its divisors is an integer number (10761200565069).

Almost surely, 2^{21522401130137} is an apocalyptic number.

It is an amenable number.

21522401130137 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522401130137 is an equidigital number, since it uses as much as digits as its factorization.

21522401130137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 21522401130137 its reverse (73103110422512), we get a palindrome (94625511552649).

The spelling of 21522401130137 in words is "twenty-one trillion, five hundred twenty-two billion, four hundred one million, one hundred thirty thousand, one hundred thirty-seven".