221313112123 has 8 divisors (see below), whose sum is σ = 230298235200. Its totient is φ = 212502457608.

The previous prime is 221313112117. The next prime is 221313112151. The reversal of 221313112123 is 321211313122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221313112123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221313112094 and 221313112103.

It is not an unprimeable number, because it can be changed into a prime (221313142123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43614553 + ... + 43619626.

It is an arithmetic number, because the mean of its divisors is an integer number (28787279400).

Almost surely, 2^221313112123 is an apocalyptic number.

221313112123 is a deficient number, since it is larger than the sum of its proper divisors (8985123077).

221313112123 is an equidigital number, since it uses as much as digits as its factorization.

221313112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87234281.

The product of its digits is 432, while the sum is 22.

Adding to 221313112123 its reverse (321211313122), we get a palindrome (542524425245).

The spelling of 221313112123 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred twelve thousand, one hundred twenty-three".