221012221110111 has 20 divisors (see below), whose sum is σ = 330154708804272. Its totient is φ = 147341190608928.

The previous prime is 221012221110077. The next prime is 221012221110119. The reversal of 221012221110111 is 111011122210122.

It is a happy number.

221012221110111 is a `hidden beast` number, since 2 + 210 + 12 + 221 + 110 + 111 = 666.

It is not a de Polignac number, because 221012221110111 - 2⁹ = 221012221109599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012221110119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43594435 + ... + 48399371.

Almost surely, 2^{221012221110111} is an apocalyptic number.

221012221110111 is a deficient number, since it is larger than the sum of its proper divisors (109142487694161).

221012221110111 is an equidigital number, since it uses as much as digits as its factorization.

221012221110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372812 (or 5372803 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221012221110111 its reverse (111011122210122), we get a palindrome (332023343320233).

The spelling of 221012221110111 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, one hundred ten thousand, one hundred eleven".