1101112222221 has 24 divisors (see below), whose sum is σ = 1735118858304. Its totient is φ = 667328074560.

The previous prime is 1101112222219. The next prime is 1101112222229. The reversal of 1101112222221 is 1222222111011.

1101112222221 is a `hidden beast` number, since 110 + 1 + 112 + 222 + 221 = 666.

It is not a de Polignac number, because 1101112222221 - 2¹ = 1101112222219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101112222194 and 1101112222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101112222229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9964545 + ... + 10074441.

It is an arithmetic number, because the mean of its divisors is an integer number (72296619096).

Almost surely, 2^{1101112222221} is an apocalyptic number.

1101112222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101112222221 is a deficient number, since it is larger than the sum of its proper divisors (634006636083).

1101112222221 is a wasteful number, since it uses less digits than its factorization.

1101112222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211121 (or 211118 counting only the distinct ones).

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

Adding to 1101112222221 its reverse (1222222111011), we get a palindrome (2323334333232).

It can be divided in two parts, 110111 and 2222221, that added together give a palindrome (2332332).

The spelling of 1101112222221 in words is "one trillion, one hundred one billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".