221013112013 has 4 divisors (see below), whose sum is σ = 221553486780. Its totient is φ = 220472737248.

The previous prime is 221013112003. The next prime is 221013112039. The reversal of 221013112013 is 310211310122.

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 199127460169 + 21885651844 = 446237^2 + 147938^2 .

It is a cyclic number.

It is not a de Polignac number, because 221013112013 - 2⁸ = 221013111757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221013111982 and 221013112000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013112003) 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, 270186770 + ... + 270187587.

It is an arithmetic number, because the mean of its divisors is an integer number (55388371695).

Almost surely, 2^221013112013 is an apocalyptic number.

It is an amenable number.

221013112013 is a deficient number, since it is larger than the sum of its proper divisors (540374767).

221013112013 is an equidigital number, since it uses as much as digits as its factorization.

221013112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540374766.

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

Adding to 221013112013 its reverse (310211310122), we get a palindrome (531224422135).

The spelling of 221013112013 in words is "two hundred twenty-one billion, thirteen million, one hundred twelve thousand, thirteen".