221130113123 has 4 divisors (see below), whose sum is σ = 221131869288. Its totient is φ = 221128356960.

The previous prime is 221130113119. The next prime is 221130113147. The reversal of 221130113123 is 321311031122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221130113123 - 2² = 221130113119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221130113095 and 221130113104.

It is not an unprimeable number, because it can be changed into a prime (221130113623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673286 + ... + 946347.

It is an arithmetic number, because the mean of its divisors is an integer number (55282967322).

Almost surely, 2^221130113123 is an apocalyptic number.

221130113123 is a deficient number, since it is larger than the sum of its proper divisors (1756165).

221130113123 is a wasteful number, since it uses less digits than its factorization.

221130113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756164.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221130113123 its reverse (321311031122), we get a palindrome (542441144245).

The spelling of 221130113123 in words is "two hundred twenty-one billion, one hundred thirty million, one hundred thirteen thousand, one hundred twenty-three".