21144150353 has 2 divisors, whose sum is σ = 21144150354. Its totient is φ = 21144150352.

The previous prime is 21144150289. The next prime is 21144150359. The reversal of 21144150353 is 35305144112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17756095504 + 3388054849 = 133252^2 + 58207^2 .

It is a cyclic number.

It is not a de Polignac number, because 21144150353 - 2⁶ = 21144150289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21144150359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572075176 + 10572075177.

It is an arithmetic number, because the mean of its divisors is an integer number (10572075177).

Almost surely, 2^21144150353 is an apocalyptic number.

It is an amenable number.

21144150353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144150353 is an equidigital number, since it uses as much as digits as its factorization.

21144150353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21144150353 its reverse (35305144112), we get a palindrome (56449294465).

The spelling of 21144150353 in words is "twenty-one billion, one hundred forty-four million, one hundred fifty thousand, three hundred fifty-three".