221211020111109 has 16 divisors (see below), whose sum is σ = 341831113574400. Its totient is φ = 124625926822320.

The previous prime is 221211020111069. The next prime is 221211020111117. The reversal of 221211020111109 is 901111020112122.

It is not a de Polignac number, because 221211020111109 - 2²¹ = 221211018013957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211020111149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74182097809 + ... + 74182100790.

It is an arithmetic number, because the mean of its divisors is an integer number (21364444598400).

Almost surely, 2^{221211020111109} is an apocalyptic number.

It is an amenable number.

221211020111109 is a deficient number, since it is larger than the sum of its proper divisors (120620093463291).

221211020111109 is a wasteful number, since it uses less digits than its factorization.

221211020111109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148364198680.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 221211020111109 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, one hundred nine".