221112101 has 16 divisors (see below), whose sum is σ = 266448000. Its totient is φ = 179247168.

The previous prime is 221112071. The next prime is 221112113. The reversal of 221112101 is 101211122.

It is a cyclic number.

It is not a de Polignac number, because 221112101 - 2²² = 216917797 is a prime.

It is a super-2 number, since 2×221112101² = 97781122417268402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112475 + ... + 114423.

It is an arithmetic number, because the mean of its divisors is an integer number (16653000).

Almost surely, 2^221112101 is an apocalyptic number.

It is an amenable number.

221112101 is a deficient number, since it is larger than the sum of its proper divisors (45335899).

221112101 is a wasteful number, since it uses less digits than its factorization.

221112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 221112101 is about 14869.8386339597. The cubic root of 221112101 is about 604.6965680114.

Adding to 221112101 its reverse (101211122), we get a palindrome (322323223).

The spelling of 221112101 in words is "two hundred twenty-one million, one hundred twelve thousand, one hundred one".