11111113230221 has 8 divisors (see below), whose sum is σ = 11154725485560. Its totient is φ = 11067585251328.

The previous prime is 11111113230187. The next prime is 11111113230227. The reversal of 11111113230221 is 12203231111111.

It can be written as a sum of positive squares in 4 ways, for example, as 8116863678121 + 2994249552100 = 2849011^2 + 1730390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111113230221 - 2³⁰ = 11110039488397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111113230193 and 11111113230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111113230227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20804906 + ... + 21332283.

It is an arithmetic number, because the mean of its divisors is an integer number (1394340685695).

Almost surely, 2^{11111113230221} is an apocalyptic number.

It is an amenable number.

11111113230221 is a deficient number, since it is larger than the sum of its proper divisors (43612255339).

11111113230221 is an equidigital number, since it uses as much as digits as its factorization.

11111113230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42138223.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 11111113230221 its reverse (12203231111111), we get a palindrome (23314344341332).

The spelling of 11111113230221 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, two hundred thirty thousand, two hundred twenty-one".