221230310113 has 4 divisors (see below), whose sum is σ = 221565001108. Its totient is φ = 220895619120.

The previous prime is 221230310047. The next prime is 221230310137. The reversal of 221230310113 is 311013032122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 196859041344 + 24371268769 = 443688^2 + 156113^2 .

It is a cyclic number.

It is not a de Polignac number, because 221230310113 - 2¹⁷ = 221230179041 is a prime.

It is a super-2 number, since 2×221230310113² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221230310153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167344506 + ... + 167345827.

It is an arithmetic number, because the mean of its divisors is an integer number (55391250277).

Almost surely, 2^221230310113 is an apocalyptic number.

It is an amenable number.

221230310113 is a deficient number, since it is larger than the sum of its proper divisors (334690995).

221230310113 is an equidigital number, since it uses as much as digits as its factorization.

221230310113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334690994.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221230310113 its reverse (311013032122), we get a palindrome (532243342235).

The spelling of 221230310113 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred ten thousand, one hundred thirteen".