221022222111 has 24 divisors (see below), whose sum is σ = 345895252560. Its totient is φ = 135455475456.

The previous prime is 221022222107. The next prime is 221022222121. The reversal of 221022222111 is 111222220122.

It is a happy number.

221022222111 is a `hidden beast` number, since 2 + 210 + 222 + 221 + 11 = 666.

It is not a de Polignac number, because 221022222111 - 2² = 221022222107 is a prime.

It is a super-3 number, since 3×221022222111³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022222101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16790976 + ... + 16804133.

It is an arithmetic number, because the mean of its divisors is an integer number (14412302190).

Almost surely, 2^221022222111 is an apocalyptic number.

221022222111 is a deficient number, since it is larger than the sum of its proper divisors (124873030449).

221022222111 is a wasteful number, since it uses less digits than its factorization.

221022222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33595175 (or 33595172 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221022222111 its reverse (111222220122), we get a palindrome (332244442233).

The spelling of 221022222111 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, one hundred eleven".