21130223203337 has 2 divisors, whose sum is σ = 21130223203338. Its totient is φ = 21130223203336.

The previous prime is 21130223203321. The next prime is 21130223203339. The reversal of 21130223203337 is 73330232203112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18080830648336 + 3049392555001 = 4252156^2 + 1746251^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130223203337 - 2⁴ = 21130223203321 is a prime.

Together with 21130223203339, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21130223203339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565111601668 + 10565111601669.

It is an arithmetic number, because the mean of its divisors is an integer number (10565111601669).

Almost surely, 2^{21130223203337} is an apocalyptic number.

It is an amenable number.

21130223203337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130223203337 is an equidigital number, since it uses as much as digits as its factorization.

21130223203337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 32.

Adding to 21130223203337 its reverse (73330232203112), we get a palindrome (94460455406449).

The spelling of 21130223203337 in words is "twenty-one trillion, one hundred thirty billion, two hundred twenty-three million, two hundred three thousand, three hundred thirty-seven".