221011110013 has 4 divisors (see below), whose sum is σ = 221020471260. Its totient is φ = 221001748768.

The previous prime is 221011109989. The next prime is 221011110029. The reversal of 221011110013 is 310011110122.

It is a happy number.

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 33575798169 + 187435311844 = 183237^2 + 432938^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011110013 - 2⁵ = 221011109981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221011109975 and 221011110002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011110083) 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, 4645120 + ... + 4692457.

It is an arithmetic number, because the mean of its divisors is an integer number (55255117815).

Almost surely, 2^221011110013 is an apocalyptic number.

It is an amenable number.

221011110013 is a deficient number, since it is larger than the sum of its proper divisors (9361247).

221011110013 is an equidigital number, since it uses as much as digits as its factorization.

221011110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9361246.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 221011110013 its reverse (310011110122), we get a palindrome (531022220135).

The spelling of 221011110013 in words is "two hundred twenty-one billion, eleven million, one hundred ten thousand, thirteen".