203311130221 has 2 divisors, whose sum is σ = 203311130222. Its totient is φ = 203311130220.

The previous prime is 203311130179. The next prime is 203311130251. The reversal of 203311130221 is 122031113302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202152748996 + 1158381225 = 449614^2 + 34035^2 .

It is a cyclic number.

It is not a de Polignac number, because 203311130221 - 2²³ = 203302741613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203311130251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101655565110 + 101655565111.

It is an arithmetic number, because the mean of its divisors is an integer number (101655565111).

Almost surely, 2^203311130221 is an apocalyptic number.

It is an amenable number.

203311130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

203311130221 is an equidigital number, since it uses as much as digits as its factorization.

203311130221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203311130221 its reverse (122031113302), we get a palindrome (325342243523).

The spelling of 203311130221 in words is "two hundred three billion, three hundred eleven million, one hundred thirty thousand, two hundred twenty-one".