235513314221 has 2 divisors, whose sum is σ = 235513314222. Its totient is φ = 235513314220.

The previous prime is 235513314203. The next prime is 235513314227. The reversal of 235513314221 is 122413315532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235090189321 + 423124900 = 484861^2 + 20570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235513314221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235513314227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117756657110 + 117756657111.

It is an arithmetic number, because the mean of its divisors is an integer number (117756657111).

Almost surely, 2^235513314221 is an apocalyptic number.

It is an amenable number.

235513314221 is a deficient number, since it is larger than the sum of its proper divisors (1).

235513314221 is an equidigital number, since it uses as much as digits as its factorization.

235513314221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

Adding to 235513314221 its reverse (122413315532), we get a palindrome (357926629753).

The spelling of 235513314221 in words is "two hundred thirty-five billion, five hundred thirteen million, three hundred fourteen thousand, two hundred twenty-one".