1100221111221 has 8 divisors (see below), whose sum is σ = 1467155119104. Its totient is φ = 733383922080.

The previous prime is 1100221111207. The next prime is 1100221111331. The reversal of 1100221111221 is 1221111220011.

It is a happy number.

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

It is not a de Polignac number, because 1100221111221 - 2¹⁷ = 1100220980149 is a prime.

It is a super-2 number, since 2×1100221111221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1100221111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100221111421) 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, 24178165 + ... + 24223626.

It is an arithmetic number, because the mean of its divisors is an integer number (183394389888).

Almost surely, 2^{1100221111221} is an apocalyptic number.

It is an amenable number.

1100221111221 is a deficient number, since it is larger than the sum of its proper divisors (366934007883).

1100221111221 is an equidigital number, since it uses as much as digits as its factorization.

1100221111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48409371.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1100221111221 its reverse (1221111220011), we get a palindrome (2321332331232).

The spelling of 1100221111221 in words is "one trillion, one hundred billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".