1105221255221 has 16 divisors (see below), whose sum is σ = 1201637928960. Its totient is φ = 1012414993920.

The previous prime is 1105221255217. The next prime is 1105221255241. The reversal of 1105221255221 is 1225521225011.

It is a cyclic number.

It is not a de Polignac number, because 1105221255221 - 2² = 1105221255217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105221255241) 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, 1600181 + ... + 2184266.

It is an arithmetic number, because the mean of its divisors is an integer number (75102370560).

Almost surely, 2^{1105221255221} is an apocalyptic number.

It is an amenable number.

1105221255221 is a deficient number, since it is larger than the sum of its proper divisors (96416673739).

1105221255221 is a wasteful number, since it uses less digits than its factorization.

1105221255221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784924.

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 1105221255221 in words is "one trillion, one hundred five billion, two hundred twenty-one million, two hundred fifty-five thousand, two hundred twenty-one".