221023311253 has 2 divisors, whose sum is σ = 221023311254. Its totient is φ = 221023311252.

The previous prime is 221023311227. The next prime is 221023311307. The reversal of 221023311253 is 352113320122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178711644049 + 42311667204 = 422743^2 + 205698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221023311253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221023311653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511655626 + 110511655627.

It is an arithmetic number, because the mean of its divisors is an integer number (110511655627).

Almost surely, 2^221023311253 is an apocalyptic number.

It is an amenable number.

221023311253 is a deficient number, since it is larger than the sum of its proper divisors (1).

221023311253 is an equidigital number, since it uses as much as digits as its factorization.

221023311253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 221023311253 its reverse (352113320122), we get a palindrome (573136631375).

The spelling of 221023311253 in words is "two hundred twenty-one billion, twenty-three million, three hundred eleven thousand, two hundred fifty-three".