1100022221221 has 16 divisors (see below), whose sum is σ = 1385035060608. Its totient is φ = 848673432000.

The previous prime is 1100022221219. The next prime is 1100022221281. The reversal of 1100022221221 is 1221222200011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1100022221221 - 2¹ = 1100022221219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100022221195 and 1100022221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100022221281) 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 15 ways as a sum of consecutive naturals, for example, 70715010 + ... + 70730563.

It is an arithmetic number, because the mean of its divisors is an integer number (86564691288).

Almost surely, 2^{1100022221221} is an apocalyptic number.

1100022221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100022221221 is a deficient number, since it is larger than the sum of its proper divisors (285012839387).

1100022221221 is a wasteful number, since it uses less digits than its factorization.

1100022221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141445692.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1100022221221 its reverse (1221222200011), we get a palindrome (2321244421232).

The spelling of 1100022221221 in words is "one trillion, one hundred billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".