11011111000221 has 8 divisors (see below), whose sum is σ = 14683570657504. Its totient is φ = 7339696004880.

The previous prime is 11011111000207. The next prime is 11011111000229. The reversal of 11011111000221 is 12200011111011.

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

It is not a de Polignac number, because 11011111000221 - 2⁹ = 11011110999709 is a prime.

It is a super-2 number, since 2×11011111000221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011111000197 and 11011111000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111000229) 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, 261140890 + ... + 261183051.

It is an arithmetic number, because the mean of its divisors is an integer number (1835446332188).

Almost surely, 2^{11011111000221} is an apocalyptic number.

It is an amenable number.

11011111000221 is a deficient number, since it is larger than the sum of its proper divisors (3672459657283).

11011111000221 is an equidigital number, since it uses as much as digits as its factorization.

11011111000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522330971.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11011111000221 its reverse (12200011111011), we get a palindrome (23211122111232).

The spelling of 11011111000221 in words is "eleven trillion, eleven billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.