221130113321 has 12 divisors (see below), whose sum is σ = 239852484828. Its totient is φ = 203775796224.

The previous prime is 221130113297. The next prime is 221130113327. The reversal of 221130113321 is 123311031122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 88484831296 + 132645282025 = 297464^2 + 364205^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221130113321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221130113293 and 221130113302.

It is not an unprimeable number, because it can be changed into a prime (221130113327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1003040 + ... + 1203473.

It is an arithmetic number, because the mean of its divisors is an integer number (19987707069).

Almost surely, 2^221130113321 is an apocalyptic number.

It is an amenable number.

221130113321 is a deficient number, since it is larger than the sum of its proper divisors (18722371507).

221130113321 is a wasteful number, since it uses less digits than its factorization.

221130113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207132 (or 2207119 counting only the distinct ones).

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

Adding to 221130113321 its reverse (123311031122), we get a palindrome (344441144443).

The spelling of 221130113321 in words is "two hundred twenty-one billion, one hundred thirty million, one hundred thirteen thousand, three hundred twenty-one".