221313313123 has 12 divisors (see below), whose sum is σ = 265750813632. Its totient is φ = 183577862160.

The previous prime is 221313313121. The next prime is 221313313141. The reversal of 221313313123 is 321313313122.

221313313123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221313313123 - 2¹ = 221313313121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221313313121) 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 in 11 ways as a sum of consecutive naturals, for example, 72846840 + ... + 72849877.

It is an arithmetic number, because the mean of its divisors is an integer number (22145901136).

Almost surely, 2^221313313123 is an apocalyptic number.

221313313123 is a deficient number, since it is larger than the sum of its proper divisors (44437500509).

221313313123 is a wasteful number, since it uses less digits than its factorization.

221313313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145696762 (or 145696755 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 221313313123 its reverse (321313313122), we get a palindrome (542626626245).

Subtracting 221313313123 from its reverse (321313313122), we obtain a palindrome (99999999999).

The spelling of 221313313123 in words is "two hundred twenty-one billion, three hundred thirteen million, three hundred thirteen thousand, one hundred twenty-three".