1111222102221 has 96 divisors (see below), whose sum is σ = 2154791808000. Its totient is φ = 534093027840.

The previous prime is 1111222102213. The next prime is 1111222102229. The reversal of 1111222102221 is 1222012221111.

1111222102221 is a `hidden beast` number, since 111 + 122 + 210 + 2 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (1111222102213) and next prime (1111222102229).

It is not a de Polignac number, because 1111222102221 - 2³ = 1111222102213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111222102194 and 1111222102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111222102229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 104271 + ... + 1494428.

It is an arithmetic number, because the mean of its divisors is an integer number (22445748000).

Almost surely, 2^{1111222102221} is an apocalyptic number.

1111222102221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111222102221 is a deficient number, since it is larger than the sum of its proper divisors (1043569705779).

1111222102221 is a wasteful number, since it uses less digits than its factorization.

1111222102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598799 (or 1598796 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111222102221 its reverse (1222012221111), we get a palindrome (2333234323332).

The spelling of 1111222102221 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".