221023110113 has 4 divisors (see below), whose sum is σ = 238024887828. Its totient is φ = 204021332400.

The previous prime is 221023110109. The next prime is 221023110167. The reversal of 221023110113 is 311011320122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311011320122 = 2 ⋅155505660061.

It can be written as a sum of positive squares in 2 ways, for example, as 94007852449 + 127015257664 = 306607^2 + 356392^2 .

It is a cyclic number.

It is not a de Polignac number, because 221023110113 - 2² = 221023110109 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221023110091 and 221023110100.

It is not an unprimeable number, because it can be changed into a prime (221023110173) 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, 8500888838 + ... + 8500888863.

It is an arithmetic number, because the mean of its divisors is an integer number (59506221957).

Almost surely, 2^221023110113 is an apocalyptic number.

It is an amenable number.

221023110113 is a deficient number, since it is larger than the sum of its proper divisors (17001777715).

221023110113 is a wasteful number, since it uses less digits than its factorization.

221023110113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001777714.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221023110113 its reverse (311011320122), we get a palindrome (532034430235).

The spelling of 221023110113 in words is "two hundred twenty-one billion, twenty-three million, one hundred ten thousand, one hundred thirteen".