1111111000221 has 16 divisors (see below), whose sum is σ = 1528732403648. Its totient is φ = 717304896000.

The previous prime is 1111111000171. The next prime is 1111111000231. The reversal of 1111111000221 is 1220001111111.

It is not a de Polignac number, because 1111111000221 - 2¹⁴ = 1111110983837 is a prime.

It is a super-2 number, since 2×1111111000221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111111000197 and 1111111000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111111000231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23696980 + ... + 23743821.

It is an arithmetic number, because the mean of its divisors is an integer number (95545775228).

Almost surely, 2^{1111111000221} is an apocalyptic number.

It is an amenable number.

1111111000221 is a deficient number, since it is larger than the sum of its proper divisors (417621403427).

1111111000221 is a wasteful number, since it uses less digits than its factorization.

1111111000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47441052.

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

Adding to 1111111000221 its reverse (1220001111111), we get a palindrome (2331112111332).

The spelling of 1111111000221 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.