21303201220337 has 2 divisors, whose sum is σ = 21303201220338. Its totient is φ = 21303201220336.

The previous prime is 21303201220313. The next prime is 21303201220369. The reversal of 21303201220337 is 73302210230312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15466609083121 + 5836592137216 = 3932761^2 + 2415904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303201220337 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303201220237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651600610168 + 10651600610169.

It is an arithmetic number, because the mean of its divisors is an integer number (10651600610169).

Almost surely, 2^{21303201220337} is an apocalyptic number.

It is an amenable number.

21303201220337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303201220337 is an equidigital number, since it uses as much as digits as its factorization.

21303201220337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

Adding to 21303201220337 its reverse (73302210230312), we get a palindrome (94605411450649).

The spelling of 21303201220337 in words is "twenty-one trillion, three hundred three billion, two hundred one million, two hundred twenty thousand, three hundred thirty-seven".