221101113123 has 12 divisors (see below), whose sum is σ = 348401754168. Its totient is φ = 134000674560.

The previous prime is 221101113067. The next prime is 221101113187. The reversal of 221101113123 is 321311101122.

It is not a de Polignac number, because 221101113123 - 2²⁴ = 221084335907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221101113096 and 221101113105.

It is not an unprimeable number, because it can be changed into a prime (221101113923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116672190 + ... + 1116672387.

It is an arithmetic number, because the mean of its divisors is an integer number (29033479514).

Almost surely, 2^221101113123 is an apocalyptic number.

221101113123 is a deficient number, since it is larger than the sum of its proper divisors (127300641045).

221101113123 is a wasteful number, since it uses less digits than its factorization.

221101113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233344594 (or 2233344591 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 221101113123 its reverse (321311101122), we get a palindrome (542412214245).

The spelling of 221101113123 in words is "two hundred twenty-one billion, one hundred one million, one hundred thirteen thousand, one hundred twenty-three".