221011101110121 has 16 divisors (see below), whose sum is σ = 347642653667328. Its totient is φ = 122218120429200.

The previous prime is 221011101110119. The next prime is 221011101110123. The reversal of 221011101110121 is 121011101110122.

It is an interprime number because it is at equal distance from previous prime (221011101110119) and next prime (221011101110123).

It is not a de Polignac number, because 221011101110121 - 2¹ = 221011101110119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221011101110121.

It is not an unprimeable number, because it can be changed into a prime (221011101110123) 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, 169747388835 + ... + 169747390136.

It is an arithmetic number, because the mean of its divisors is an integer number (21727665854208).

Almost surely, 2^{221011101110121} is an apocalyptic number.

221011101110121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221011101110121 is a deficient number, since it is larger than the sum of its proper divisors (126631552557207).

221011101110121 is a wasteful number, since it uses less digits than its factorization.

221011101110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339494779012.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221011101110121 its reverse (121011101110122), we get a palindrome (342022202220243).

Subtracting from 221011101110121 its reverse (121011101110122), we obtain a palindrome (99999999999999).

The spelling of 221011101110121 in words is "two hundred twenty-one trillion, eleven billion, one hundred one million, one hundred ten thousand, one hundred twenty-one".