221000011101111 has 32 divisors (see below), whose sum is σ = 330652790558208. Its totient is φ = 130117995354240.

The previous prime is 221000011101047. The next prime is 221000011101137. The reversal of 221000011101111 is 111101110000122.

It is not a de Polignac number, because 221000011101111 - 2⁶ = 221000011101047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000011101211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139085740 + ... + 140665713.

It is an arithmetic number, because the mean of its divisors is an integer number (10332899704944).

Almost surely, 2^{221000011101111} is an apocalyptic number.

221000011101111 is a deficient number, since it is larger than the sum of its proper divisors (109652779457097).

221000011101111 is a wasteful number, since it uses less digits than its factorization.

221000011101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279752151.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 221000011101111 its reverse (111101110000122), we get a palindrome (332101121101233).

It can be divided in two parts, 221000011 and 101111, that added together give a palindrome (221101122).

The spelling of 221000011101111 in words is "two hundred twenty-one trillion, eleven million, one hundred one thousand, one hundred eleven".