221012222211111 has 64 divisors (see below), whose sum is σ = 317060365409280. Its totient is φ = 136581845621760.

The previous prime is 221012222211101. The next prime is 221012222211133. The reversal of 221012222211111 is 111112222210122.

It is not a de Polignac number, because 221012222211111 - 2⁹ = 221012222210599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012222211101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2852063076 + ... + 2852140566.

It is an arithmetic number, because the mean of its divisors is an integer number (4954068209520).

Almost surely, 2^{221012222211111} is an apocalyptic number.

221012222211111 is a deficient number, since it is larger than the sum of its proper divisors (96048143198169).

221012222211111 is a wasteful number, since it uses less digits than its factorization.

221012222211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81976.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221012222211111 its reverse (111112222210122), we get a palindrome (332124444421233).

The spelling of 221012222211111 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eleven".