155300112221 has 2 divisors, whose sum is σ = 155300112222. Its totient is φ = 155300112220.

The previous prime is 155300112211. The next prime is 155300112259. The reversal of 155300112221 is 122211003551.

155300112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108907260121 + 46392852100 = 330011^2 + 215390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155300112221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155300112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77650056110 + 77650056111.

It is an arithmetic number, because the mean of its divisors is an integer number (77650056111).

Almost surely, 2^155300112221 is an apocalyptic number.

It is an amenable number.

155300112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

155300112221 is an equidigital number, since it uses as much as digits as its factorization.

155300112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 155300112221 its reverse (122211003551), we get a palindrome (277511115772).

The spelling of 155300112221 in words is "one hundred fifty-five billion, three hundred million, one hundred twelve thousand, two hundred twenty-one".