221223210111 has 6 divisors (see below), whose sum is σ = 319544636840. Its totient is φ = 147482140068.

The previous prime is 221223210101. The next prime is 221223210133. The reversal of 221223210111 is 111012322122.

221223210111 is a `hidden beast` number, since 221 + 223 + 210 + 1 + 11 = 666.

It is not a de Polignac number, because 221223210111 - 2⁵ = 221223210079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221223210101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12290178331 + ... + 12290178348.

Almost surely, 2^221223210111 is an apocalyptic number.

221223210111 is a deficient number, since it is larger than the sum of its proper divisors (98321426729).

221223210111 is a wasteful number, since it uses less digits than its factorization.

221223210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24580356685 (or 24580356682 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221223210111 its reverse (111012322122), we get a palindrome (332235532233).

The spelling of 221223210111 in words is "two hundred twenty-one billion, two hundred twenty-three million, two hundred ten thousand, one hundred eleven".